title: The Macruz index in the healthy newborn and infant.
mesh_terms: D000367:Age Factors; D001724:Birth Weight; D006332:Cardiomegaly / Q000175:diagnosis; D004562:Electrocardiography; D006325:Heart Atria; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature