For citations:

Feiskhanova L.I., Abdulganieva D.I. Early signs of myocardial dysfunction in patients with rheumatoid arthritis and ankylosing spondylitis. The Clinician. 2020;14(3-4):36-42. (In Russ.) https://doi.org/10.17650/1818-8338-2020-14-3-4-K632