Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector6177810.17816/kazmj61778Research ArticleDynamics of some immunological parameters during treatment with pentoxil in patients with chronic obstructive bronchitisArsentievF. V.info@eco-vector.comMarasanovS. B.info@eco-vector.com150819856642712742402202124022021Copyright © 1985, Arsentiev F.V., Marasanov S.B.1985<p>An important reason for the frequent recurrence and progression of chronic diseases is considered to be a violation of the body's immune defense [7, 9].</p>Kazan Medical archiveКазанский медицинский архив