00578naa#a2200169#i#450# EN\\bibl\42147 20240416164158.2 2409-3750 20210202b2021####ek#y0engy0150####ca RU Stages of development of cardiology as an independent branch of medical science Journal article Tula LLC Information and publishing center Innovations and investments 2021 4 с. Journal article local Медицина. Охрана здоровья. 61 Vol'nyagina A. S. naukaru.ru