For citations:

Bolotova E.V., Trembach V.V., Dudnikova A.V. The effect of native vitamin D therapy on echocardiographic parameters of patients with chronic obstructive pulmonary disease and early-stage chronic kidney disease. Cardiovascular Therapy and Prevention. 2020;19(2):2434. (In Russ.) https://doi.org/10.15829/1728-8800-2020-2434