CJCP     2021 23 (11):  1097-1102    ISSN: 1008-8830  CN: 43-1301/R Effect of different maintenance doses of caffeine citrate on ventilator weaning in very preterm infants with respiratory distress syndrome: a prospective randomized controlled trial LI Xiao-Lan, CAI Yue-Ju, ZHANG Zhe, LI Jian, CHEN Xiao-Wen, SONG Yan-Yan, ZHOU Wei Department of Child Health Care, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China Received: 2021-07-30  Revised: null  Online: null Supporting info