CJCP     2022 24 (3):  240-248    ISSN: 1008-8830  CN: 43-1301/R Clinical effect of different maintenance doses of caffeine citrate in the treatment of preterm infants requiring assisted ventilation: a pilot multicenter study YANG Yang, LU Ke-Yu, CHENG Rui, ZHOU Qin, FANG Guang-Dong, LI Hong, SHAO Jie, WANG Huai-Yan, LI Zheng-Ying, LIU Song-Lin, LI Zhen-Guang, CAI Jin-Lan, XUE Mei, CHEN Xiao-Qing, PAN Zhao-Jun, GAO Yan, HUANG Li, LI Hai-Ying, SONG Lei, WANG San-Nan, SHU Gui-Hua, WU Wei, YU Meng-Zhu, XU Zhun, LI Hong-Xin, XU Yan, BAO Zhi-Dan, WU Xin-Ping, YE Li, DONG Xue-Ping, YIN Qi-Gai, YIN Xiao-Ping, ZHOU Jin-Jun Department of Neonatology, Children's Hospital of Nanjing Medical University, Nanjing 210000, China) Received: 2021-09-26  Revised: null  Online: null Supporting info