For citations:
Kovalevskiy E.V., Schüz J., Bukhtiyarov I.V., Kashanskiy S.V. Experience of cohort formation and data collection in a retrospective cohort epidemiological study. Russian Journal of Occupational Health and Industrial Ecology. 2021;61(4):253-266. (In Russ.) https://doi.org/10.31089/1026-9428-2021-61-4-253-266