For citations:
Martsevich S.Yu., Kutishenko N.P., Lukina Yu.V., Lukyanov M.M., Drapkina O.M. Observational studies and registers. Their quality and role in modern evidence-based medicine. Cardiovascular Therapy and Prevention. 2021;20(2):2786. (In Russ.) https://doi.org/10.15829/1728-8800-2021-2786