For citations:
Bolotova E.V., Yavlyanskaya V.V., Dudnikova A.V. Cardiorenal relationships and a role of vitamin D in patients with chronic obstructive pulmonary disease. PULMONOLOGIYA. 2018;28(5):613-621. (In Russ.) https://doi.org/10.18093/0869-0189-2018-28-5-613-621