00577naa#a2200169#i#4500001001500000005001700015011001400032100004100046102000700087200010100094210008200195215001000277608002700287675005600314700002300370856001400393EN\\bibl\4214720260522131253.5##a2409-3750##a20210202b2021####ek#y0engy0150####ca##aRU1#aStages of development of cardiology as an independent branch of medical scienceeJournal article1#aTulacLLC Information and publishing center Innovations and investmentsd2021##a4 с.##aJournal article2local##aМедицина. Охрана здоровья. 61#1aVol'nyaginagA. S.4#azh-szf.ru