title: Effects of theophylline on serum and urine electrolytes in preterm infants with apnea.
mesh_terms: D001049:Apnea / Q000188:drug therapy*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000188:drug therapy*; D008297:Male; D013806:Theophylline / Q000494:pharmacology*; D014882:Water-Electrolyte Balance / Q000187:drug effects*
chemical_list: D013806:Theophylline