Job Specifics of IT Specialists and Approaches to Disease Prevention



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Abstract

Within the national program “Digital Economy of the Russian Federation,” it is relevant to examine job specifics of IT specialists and their impact on performance status. Changes in this area necessitate reviewing approaches to disease prevention. For this purpose, we performed a retrospective analysis of publications on job specifics and working conditions of IT specialists to identify relevant issues and approaches to their prevention in the current context. The search was performed in PubMed (using MeSH terms) and eLIBRARY.RU. The search depth was 1972–2024. The MeSH terms and keywords were related to work with computers and information systems, as well as occupational risk factors and outcomes. In total, 3647 publications on relevant disorders and work system components were reviewed. A more detailed analysis included meta-analyses, systematic reviews, randomized controlled studies, cohort studies, case–control studies, and the most significant cross-sectional studies (a total of 86 publications). Working with visual display terminals increases the risk of subjective complaints of visual processing disorders, dry eye, and ocular hypertension, as well as musculoskeletal discomfort, dysautonomia, sleep disorders, and psychological disorders. There was no increased risk of reproductive disorders; however, there is evidence of the impact on fertility. Priority areas for prevention programs should include control of cognitive workload and occupational stress, improved workplace ergonomics and lighting conditions, prevention of visual processing disorders, and psychological support. The programs must take into consideration the changes in workflow.

About the authors

Liliya M. Fatkhutdinova

Kazan State Medical University

Email: liliya.fatkhutdinova@gmail.com
ORCID iD: 0000-0001-9506-563X
SPIN-code: 9605-8332

MD, Dr. Sci. (Medicine), Professor, Head, Depart. of Hygiene and Occupational Medicine

Russian Federation, Kazan

Adelya R. Mukhutdinova

Kazan State Medical University

Email: adelya.gigienist@mail.ru
ORCID iD: 0009-0002-5705-2007
SPIN-code: 8700-9716

postgraduate student, Assistant  Lecturer, Depart. of Hygiene and Occupational Medicine

Russian Federation, Kazan

Nail Kh. Amirov

Kazan State Medical University

Author for correspondence.
Email: amirov@kgmu.kcn.ru
ORCID iD: 0000-0003-0009-9103

MD, Dr. Sci. (Medicine), professor, academician of the National Academy of Medical Sciences

Russian Federation, Kazan

References

  1. Abashkin VL, Abdrakhmanova GI, Vishnevskiy KO, et al. Digital Economy Indicators in the Russian Federation. Data Book. HSE University. Moscow: HSE ISSEK; 2024. 274 p. (In Russ.) ISBN: 978-5-7598-3008-5
  2. Federal State Statistics Service of the Russian Federation. Labor and employment in Russia 2023. Statistical collection. Rosstat. Moscow, 2023. 180 p. (In Russ.). Available from: http://ssl.rosstat.gov.ru/storage/mediabank/Trud_2023.pdf
  3. Dunkaeva LM. Khasanov DA. Fundamental and design features of LCD displays. In: Digital era. Proceedings of the III All-Russian Scientific and Practical Conference. Grozny: Kadyrov Chechen State University; 2023. P. 45–48. doi: 10.36684/93-1-2023-45-48 EDN: YOSGGE
  4. Johansson G, Aronsson G. Stress reactions in computerized administrative work. Journal of Organizational Behavior. 1984;5(3):159–181. doi: 10.1002/job.4030050302
  5. Carayon P, Smith MJ. Work organization and ergonomics. Applied Ergonomics. 2000;31(6):649–662. doi: 10.1016/s0003-6870(00)00040-5
  6. Sethi V, King RC, Quick JC. What causes stress in information system professionals? Communications of the ACM. 2004;47(3):99–102 doi: 10.1145/971617.971623
  7. Huuhtanen P, Leino T. The impact of new technology by occupation and age on work in financial firms: A 2-year follow-up. International Journal of Human-Computer Interaction. 1992;4(2):123–142. doi: 10.1080/10447319209526032
  8. Wang G, Cui Y. Meta-analysis of visual fatigue based on visual display terminals. BMC Ophthalmol. 2024;24(1). doi: 10.1186/s12886-024-03721-1 EDN: VHQJTX
  9. National Research Council (1995). Final progress report for the period 4/1/92 through 3/31/95 to the Department of Energy on the Solid State Sciences Committee National Academy of Sciences — National Research Council. 1995. doi: 10.2172/764577
  10. Bergqvist UO. Video display terminals and health. A technical and medical appraisal of the state of the art. Scand J Work Environ Health. 1984;10 suppl 2:1–87. Available from: https://www.sjweh.fi/article/2370
  11. Yamaguchi H, Ishikawa S, Ueda S. Effect of VDUs on the eyes: Report of a 6-year epidemiological study. Japan Association of Industrial Health. 1986. doi: 10.1097/00006324-199608000-00001
  12. Smith AB, Tanaka S, Halperin WE, et al. A Preliminary Report on a Cross-Sectional Survey of VDT Users at the Baltimore Sun. Cincinnati, Ohio: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 80-127-1337; 1983. 162 p. Available from: https://stacks.cdc.gov/view/cdc/171788
  13. Rechichi C, Scullica L. Trends regarding myopia in video terminal operators. Acta Ophthalmol Scand. 1996;74(5):493–496. doi: 10.1111/j.1600-0420.1996.tb00606.x
  14. Rechichi C, Scullica L. VDU work: longitudinal survey on refractive defects. Acta Ophthalmol Scand. 1996;74(6):629–631. doi: 10.1111/j.1600-0420.1996.tb00750.x
  15. Tatemichi M, Nakano T, Tanaka K, et al. Possible association between heavy computer users and glaucomatous visual field abnormalities: a cross sectional study in Japanese workers. J Epidemiol Community Health. 2004;58(12):1021–1027. doi: 10.1136/jech.2003.018127
  16. Nakano T, Hayashi T, Nakagawa T, et al. Increased Incidence of Visual Field Abnormalities as Determined by Frequency Doubling Technology Perimetry in High Computer Users Among Japanese Workers: A Retrospective Cohort Study. J Epidemiol. 2018;28(4):214–219. doi: 10.2188/jea.JE20170004
  17. Gur S, Ron S, Heicklen-Klein A. Objective evaluation of visual fatigue in VDU workers. Occup Med. 1994;44(4):201–204. doi: 10.1093/occmed/44.4.201 EDN: IVJZMJ
  18. Nyman KG, Knave BG, Voss M. Work with video display terminals among office employees. IV. Refraction, accommodation, convergence and binocular vision. Scand J Work Environ Health. 1985;11(6):483–487. doi: 10.5271/sjweh.2198
  19. Qian L, Wei W. Identified risk factors for dry eye syndrome: A systematic review and meta-analysis. PLoS One. 2022;17(8):e0271267. doi: 10.1371/journal.pone.0271267 EDN: GKWXPH
  20. Tsubota K, Nakamori K. Dry eyes and video display terminals. N Engl J Med. 1993;328(8):584. doi: 10.1056/NEJM199302253280817
  21. Prasetya TA, Al Mamun A, Rahmania A, et al. Prevalence and associated risk factors of musculoskeletal disorders among information technology (IT) professionals: A systematic review. Narra J. 2024;4(3):e1100. doi: 10.52225/narra.v4i3.1100 EDN: XUZJKV
  22. Jensen C. Development of neck and hand-wrist symptoms in relation to duration of computer use at work. Scand J Work Environ Health. 2003;29(3):197–205. doi: 10.5271/sjweh.722
  23. Lassen CF, Mikkelsen S, Kryger AI, et. al. Elbow and wrist/hand symptoms among 6,943 computer operators: a 1-year follow-up study (the NUDATA study). Am J Ind Med. 2004;46(5):521–533. doi: 10.1002/ajim.20081
  24. Andersen JH, Thomsen JF, Overgaard E, et. al. Computer use and carpal tunnel syndrome: a 1-year follow-up study. JAMA. 2003;289(22):2963–2969. doi: 10.1001/jama.289.22.2963
  25. Kryger AI, Andersen JH, Lassen CF, et al. Does computer use pose an occupational hazard for forearm pain; from the NUDATA study. Occup Environ Med. 2003;60(11):e14. doi: 10.1136/oem.60.11.e14
  26. Brandt LP, Andersen JH, Lassen CF, et al. Neck and shoulder symptoms and disorders among Danish computer workers. Scand J Work Environ Health. 2004;30(5):399–409. doi: 10.5271/sjweh.828
  27. Tornqvist EW, Hagberg M, Hagman M, et al. The influence of working conditions and individual factors on the incidence of neck and upper limb symptoms among professional computer users. Int Arch Occup Environ Health. 2009;82(6):689–702. doi: 10.1007/s00420-009-0396-7 EDN: ZJEHZN
  28. Shiri R, Falah-Hassani K. Computer use and carpal tunnel syndrome: A meta-analysis. J Neurol Sci. 2015;349(1–2):15–19. doi: 10.1016/j.jns.2014.12.037
  29. Zaitsu T, Inoue Y, Oshiro A, et al. Association of visual display terminal time with prevalence of temporomandibular disorder among Japanese workers. J Occup Health. 2022;64(1):e12370. doi: 10.1002/1348-9585.12370 EDN: DOFGRW
  30. Robertson MM, Huang YH, Lee J. Improvements in musculoskeletal health and computing behaviors: Effects of a macroergonomics office workplace and training intervention. Appl Ergon. 2017;62:182–196. doi: 10.1016/j.apergo.2017.02.017
  31. Taylor WC, Williams JR, Harris LE, Shegog R. Computer Prompt Software to Reduce Sedentary Behavior and Promote Physical Activity Among Desk-Based Workers: A Systematic Review. Hum Factors. 2023;65(5):891–908. doi: 10.1177/00187208211034271 EDN: PBONVS
  32. Wang L, Yang H, Song X, et al. Physical Activity Level and Social-Ecological Influence Factors in Chinese Information Technology Professionals: A Cross-Sectional Study. J Environ Public Health. 2022;2022:4580589. doi: 10.1155/2022/4580589 EDN: JJPKYK
  33. Shrestha N, Kukkonen-Harjula KT, Verbeek JH, et al. Workplace interventions for reducing sitting at work. Cochrane Database Syst Rev. 2018;12(12):CD010912. doi: 10.1002/14651858.CD010912.pub5
  34. VDT-pregnancy clusters prompt NIOSH research. Microwave News. 1984;IV(4):1–12. Available from: https://microwavenews.com/sites/default/files/sites/default/files/backissues/may84issue.pdf
  35. Parazzini F, Luchini L, La Vecchia C, Crosignani PG. Video display terminal use during pregnancy and reproductive outcome—a meta-analysis. J Epidemiol Community Health. 1993;47(4):265–268. doi: 10.1136/jech.47.4.265
  36. McDonald AD, McDonald JC, Armstrong B, et al. Work with visual display units in pregnancy. Br J Ind Med. 1988;45(8):509–515. doi: 10.1136/oem.45.8.509
  37. Goldhaber MK, Polen MR, Hiatt RA. The risk of miscarriage and birth defects among women who use visual display terminals during pregnancy. Am J Ind Med. 1988;13(6):695–706.
  38. Nurminen T, Kurppa K. Office employment, work with video display terminals, and course of pregnancy. Reference mothers' experience from a Finnish case-referent study of birth defects. Scand J Work Environ Health. 1988;14(5):293–298. doi: 10.5271/sjweh.1917
  39. Grajewski B, Schnorr TM, Reefhuis J, et al. Work with video display terminals and the risk of reduced birthweight and preterm birth. Am J Ind Med. 1997;32(6):681–688. doi: 10.1002/(sici)1097-0274(199712)32:6<681::aid-ajim16>3.0.co;2-y
  40. Lindbohm ML, Hietanen M, Kyyrönen P, et al. Magnetic fields of video display terminals and spontaneous abortion. Am J Epidemiol. 1992;136(9):1041–1051. doi: 10.1093/oxfordjournals.aje.a116569
  41. Delpizzo V. Epidemiological studies of work with video display terminals and adverse pregnancy outcomes (1984–1992). Am J Ind Med. 1994;26(4):465–480. doi: 10.1002/ajim.4700260404
  42. Ericson A, Källén B. An epidemiological study of work with video screens and pregnancy outcome: II. A case-control study. Am J Ind Med. 1986;9(5):459–475. doi: 10.1002/ajim.4700090507
  43. Nielsen CV, Brandt LP. Spontaneous abortion among women using video display terminals. Scand J Work Environ Health. 1990;16(5):323–328. doi: 10.5271/sjweh.1777
  44. Brandt LP, Nielsen CV. Congenital malformations among children of women working with video display terminals. Scand J Work Environ Health. 1990;16(5):329–333. doi: 10.5271/sjweh.1776
  45. Filippova TYu, Lashkina AA, Alekseyev OG. Female reproductive health maintenance and promotion in a contemporary megapolis. Profilaktika zabolevanii i ukreplenie zdorov''ya. 2008;11(3):11–14. EDN: JKADTD
  46. Smith EM, Hammonds-Ehlers M, Clark MK, et al. Occupational exposures and risk of female infertility. J Occup Environ Med. 1997;39(2):138–147. doi: 10.1097/00043764-199702000-00011
  47. Sterling L, Carroll K, Harris LR. Laptop and tablet use and their influence on total motile sperm count parameters: are laptops linked to infertility in Jamaican men? Rev Int Androl. 2024;22(4):25–32. doi: 10.22514/j.androl.2024.027
  48. Watanabe S, Torii J, Shinkai S, Watanabe T. Relationship between health status and working conditions and personalities among VDT workers. Environ Res. 1993;61(2):258–265. doi: 10.1006/enrs.1993.1070
  49. Thomee S, Eklof M, Gustafsson E, et al. Prevalence of perceived stress, symptoms of depression and sleep disturbances in relation to information and communication technology (ICT) use among young adults — an explorative prospective study. Computers in Human Behaviour. 2007;23(3):1300–1321. doi: 10.1016/j.chb.2004.12.007
  50. Kim T, Kang MY, Yoo MS, et al. Computer use at work is associated with self-reported depressive and anxiety disorder. Ann Occup Environ Med. 2016;28:57. doi: 10.1186/s40557-016-0146-8
  51. Lalloo D, Lewsey J, Katikireddi SV, et al. Comparing Anxiety and Depression in Information Technology Workers with Others in Employment: A UK Biobank Cohort Study. Ann Work Expo Health. 2022;66(9):1136–1150. doi: 10.1093/annweh/wxac061 EDN: UWGKYQ
  52. Smith MJ, Cohen BG, Stammerjohn LW J. An investigation of health complaints and job stress in video display operations. Hum Factors. 1981;23(4):387–400. doi: 10.1177/001872088102300402
  53. Tomei G, Rosati MV, Martini A, et al. Assessment of subjective stress in video display terminal workers. Ind Health. 2006;44(2):291–295. doi: 10.2486/indhealth.44.291
  54. Ye Z. Abe Y. Kusano Y. et. al. The influence of visual display terminal use on the physical and mental conditions of administrative staff in Japan. J Physiol Anthropol. 2007;26(2):69–73. doi: 10.2114/jpa2.26.69
  55. Sugimura H, Horiguchi T, Shimizu T. Marui E. Relationship between emploees' management factor of visual display terminal (VDT) work time and 28-item General Health Questionnaire (GHQ-28) at one Japanese IT company's computer worksite. Nihon Eiseigaku Zasshi. 2007;62(4):960–966. doi: 10.1265/jjh.62.960
  56. Nakazawa T, Okubo Y, Suwazono Y, et al. Association between duration of daily VDT use and subjective symptoms. Am J Ind Med. 2002;42(5):421–426. doi: 10.1002/ajim.10133
  57. Fatkhutdinova LM, Amirov NH. Effect of the work with videodisplay terminals on the mental profile of the personality. Kazan medical journal. 1995;76(4):297–299. doi: 10.17816/kazmj101492
  58. Shin S, Yang EH, Lee HC, et al. The relationship between visual display terminal usage at work and symptoms related to computer vision syndrome. Ann Occup Environ Med. 2023;35:e1. doi: 10.35371/aoem.2023.35.e1 EDN: XJBTRE
  59. Li C, Zhang L, Zhou J, et al. Prevalence of primary headache disorders among information technology staff in China: the negative effects of computer use and other correlative factors. BMC Public Health. 2020;20(1):443. doi: 10.1186/s12889-020-08497-9 EDN: QLZZIF
  60. Tachibana H, Izumi T, Honda S, et al. A study of the impact of occupational and domestic factors on insomnia among industrial workers of a manufacturing company in Japan. Occup Med. 1996;46(3):221–217. doi: 10.1093/occmed/46.3.221 EDN: HYLLYY
  61. Tachibana H, Izumi T, Honda S, Takemoto T. The prevalence and pattern of insomnia in Japanese industrial workers: relationship between psychosocial stress and type of insomnia. Psychiatry Clin Neurosci. 1998;52:397–402. doi: 10.1046/j.1440-1819.1998.00407.x
  62. Yoshioka E, Saijo Y, Fukui T, et al. Association between duration of daily visual display terminal work and insomnia among local government clerks in Japan. Am J Ind Med. 2008;51(2):148–156. doi: 10.1002/ajim.20543
  63. Paskenova AV, Makaricheva EV, Fatkhutdinova LM. Psychological characteristics of IT workers with different professional tasks. Neurological Bulletin. 2018;1:33–36. doi: 10.17816/nb119894 EDN: TFCLBL
  64. Kurlyandskaya NV, Lisakova AA, Safina AS. Study of the severity of burnout syndrome among representatives of IT professions. Social Science and Social Psychology. 2022;12:47–56. (In Russ.) EDN: IADKCB
  65. Mohan V, Inbaraj LR, George CE, Norman G. Prevalence of complaints of arm, neck, and shoulders among computer professionals in Bangalore: A cross-sectional study. J Family Med Prim Care. 2019;8(1):171–177. doi: 10.4103/jfmpc.jfmpc_253_18
  66. Sahu M, Gnanaraj Solomon D, Vijay SJ, Sudhahar JC. Ergonomic evaluation of the risk factors causing pain in the upper part of the body among IT professionals in India. Work. 2020;67(4):993–1005. doi: 10.3233/WOR-203349 EDN: DDSNXM
  67. Das A, Shah S, Adhikari TB, et al. Computer vision syndrome, musculoskeletal, and stress-related problems among visual display terminal users in Nepal. PLoS One. 2022;17(7):e0268356. doi: 10.1371/journal.pone.0268356 EDN: ONMTBC
  68. Eltayeb S, Staal JB, Hassan A, de Bie RA. Work related risk factors for neck, shoulder and arms complaints: a cohort study among Dutch computer office workers. J Occup Rehabil. 2009;19(4):315–322. doi: 10.1007/s10926-009-9196-x EDN: UYCQHA
  69. Zayed HAM, Saied SM, Younis EA, Atlam SA. Digital eye strain: prevalence and associated factors among information technology professionals, Egypt. Environ Sci Pollut Res Int. 2021;28(20):25187–25195. doi: 10.1007/s11356-021-12454-3 EDN: NEQJTI
  70. Osterhaus W, Hemphälä H, Nylén P. Lighting at computer workstations. Work. 2015;52(2):315–328. doi: 10.3233/WOR-152163
  71. Gowrisankaran S, Sheedy JE. Computer vision syndrome: A review. Work. 2015;52(2):303–314. doi: 10.3233/WOR-152162
  72. Tew GA, Posso MC, Arundel CE, McDaid CM. Systematic review: height-adjustable workstations to reduce sedentary behaviour in office-based workers. Occup Med. 2015;65(5):357–366. doi: 10.1093/occmed/kqv044
  73. Parry SP, Coenen P, Shrestha N, et al. Workplace interventions for increasing standing or walking for decreasing musculoskeletal symptoms in sedentary workers. Cochrane Database Syst Rev. 2019;2019(11):CD012487. doi: 10.1002/14651858.CD012487.pub2 EDN: LBYREJ
  74. Kavet R, Tell RA. VDTs: field levels, epidemiology, and laboratory studies. Health Phys. 1991;61(1):47–57. doi: 10.1097/00004032-199107000-00005
  75. Sisto R, Casciardi S, Giliberti C, Moleti A. Electromagnetic radiation from VDT units: study of the effectiveness of an active shielding device. Am Ind Hyg Assoc J. 1999;60(1):111–115. doi: 10.1080/00028899908984429
  76. Cole BL. Do video display units cause visual problems? — a bedside story about the processes of public health decision-making. Clin Exp Optom. 2003;86(4):205–220. doi: 10.1111/j.1444-0938.2003.tb03108.x
  77. Evans GW, Johnson D. Stress and open-office noise. J Appl Psychol. 2000;85(5):779–783. doi: 10.1037/0021-9010.85.5.779
  78. Van Houten G, Cabrita J, Vargas O. Working conditions and job quality: Comparing sectors in Europe — Overview report. European Foundation for the Improvement of Living and Working Conditions, 2014. 62 p. Available from: https://www.eurofound.europa.eu/en/publications/all/working-conditions-and-job-quality-comparing-sectors-europe-overview-report#overview
  79. Ram D, Mushtaq NF, Honnugudi BD, Alammar MA. Level and Relationships of Life Satisfaction with Cognitive Flexibility and Resilience in IT Professionals. Indian J Occup Environ Med. 2022;26(2):84–90. doi: 10.4103/ijoem.ijoem_213_21 EDN: LOBXRT
  80. Nasui BA, Toth A, Popescu CA, et. al. Comparative Study on Nutrition and Lifestyle of Information Technology Workers from Romania before and during COVID-19 Pandemic. Nutrients. 2022;14(6):1202. doi: 10.3390/nu14061202 EDN: ZFNGUA
  81. Kubo T, Izawa S, Ikeda H, et al. Work e-mail after hours and off-job duration and their association with psychological detachment, actigraphic sleep, and saliva cortisol: A 1-month observational study for information technology employees. J Occup Health. 2021;63(1):e12300. doi: 10.1002/1348-9585.12300 EDN: IAVZDB
  82. Zheng B, Chen F, Wang J, et al. The Prevalence and Correlated Factors of Occupational Stress, Cumulative Fatigue, and Musculoskeletal Disorders among Information Technology Workers: A Cross-Sectional Study in Chongqing, China. Healthcare. 2023;11(16):2322. doi: 10.3390/healthcare11162322 EDN: EXPWDY
  83. Zhang LZ, Sha Y, Zhuang XY, et al. The study of relationship between occupational stress and sleep quality of video display terminals. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2022;40(11):837–841. doi: 10.3760/cma.j.cn121094-20210629-00316
  84. Medeiros J, Simões M, Castelhano J, et al. EEG as a potential ground truth for the assessment of cognitive state in software development activities: A multimodal imaging study. PLoS One. 2024;19(3):e0299108. doi: 10.1371/journal.pone.0299108 EDN: XWIBGS
  85. Hao G, Hijazi H, Durães J, et al. On the accuracy of code complexity metrics: A neuroscience-based guideline for improvement. Front Neurosci. 2023;16:1065366. doi: 10.3389/fnins.2022.1065366 EDN: TQXORD
  86. Medeiros J, Teixeira C, Couceiro R, et al. Software code complexity assessment using EEG features. Annu Int Conf IEEE Eng Med Biol Soc. 2019;2019:1413–1416. doi: 10.1109/EMBC.2019.8856283
  87. Medeiros J, Couceiro R, Duarte G, et al. Can EEG Be Adopted as a Neuroscience Reference for Assessing Software Programmers' Cognitive Load? Sensors. 2021;21(7):2338. doi: 10.3390/s21072338 EDN: WDAIWS
  88. Fatkhutdinova LM, Ismagilov MF, Amirov NK, Gallyamov AB. Study of autonomic disorders in video display terminal users. Kazan medical journal. 1999;80(6):443–445. doi: 10.17816/kazmj70587 EDN: EDAPDC
  89. Larese Filon F, Drusian A, Ronchese F, Negro C. Video Display Operator Complaints: A 10-Year Follow-Up of Visual Fatigue and Refractive Disorders. Int J Environ Res Public Health. 2019;16(14):2501. doi: 10.3390/ijerph16142501
  90. Darshan MS, Raman R, Rao TS, et al. A study on professional stress, depression and alcohol use among Indian IT professionals. Indian J Psychiatry. 2013;55(1):63–69. doi: 10.4103/0019-5545.105512
  91. Toomingas A, Hagberg M, Heiden M, et al. Risk factors, incidence and persistence of symptoms from the eyes among professional computer users. Work. 2014;47(3):291–301. doi: 10.3233/WOR-131778

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