title: Ionized calcium, cardiac function, and electrocardiogram in preterm neonates.
mesh_terms: D002118:Calcium / Q000097:blood*; D004562:Electrocardiography; D006331:Heart Diseases / Q000503:physiopathology*; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000503:physiopathology*
chemical_list: D002118:Calcium