Oksana M. Herasymova and Volodymyr M. Savvo 2021. PERINATAL AND HEREDITARY RISK FACTORS OF HEART RATE AND CONDUCTION DISORDERS IN CHILDREN WITH GASTROESOPHAGEAL REFLUX. Eastern Ukrainian Medical Journal. 9, 4 (Dec. 2021), 352–361. DOI:https://doi.org/10.21272/eumj.2021;9(4):352-361.