Efficacy of low-dose theophylline.
D001049:Apnea / Q000188:drug therapy*; D001919:Bradycardia / Q000188:drug therapy; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000188:drug therapy*; D007234:Infant, Premature; D012895:Sleep, REM; D013806:Theophylline / Q000097:blood / Q000627:therapeutic use*
D013806:Theophylline