title: [STUDIES ON ELECTROCARDIOGRAPHY IN CHILDREN. II. ON ELECTROCARDIOGRAPHIC CHANGES WITH AGE AND THEIR RELATION TO PHYSICAL GROWTH].
mesh_terms: D000293:Adolescent; D000375:Aging; D001686:Biological Phenomena; D002648:Child; D004562:Electrocardiography; D006128:Growth; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010829:Physiological Phenomena
keywords: ADOLESCENCE; AGING; CHILD; ELECTROCARDIOGRAPHY; GROWTH; INFANT; INFANT, NEWBORN