Zhao, Ying [Clinical effectiveness of different doses of caffeine for primary apnea in preterm infants]. [electronic resource] - Zhonghua er ke za zhi = Chinese journal of pediatrics Jan 2016 - 33-6 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0578-1310 Standard No.: 10.3760/cma.j.issn.0578-1310.2016.01.008 doi Subjects--Topical Terms: Apnea--drug therapyBirth WeightCaffeine--administration & dosageCitrates--administration & dosageFemaleGestational AgeHumansInfant, NewbornInfant, PrematureInfant, Premature, Diseases--drug therapyMalePregnancyTreatment Outcome