CJCP     2022 24 (2):  169-175    ISSN: 1008-8830  CN: 43-1301/R Effect of prophylactic use of hydrolyzed protein formula on gastrointestinal diseases and physical growth in preterm infants: a Meta analysis XIANG Ling-Ling, HU Yuan-Yuan, XIA Xu-Hua, HUA Zi-Yu Department of Neonatology, Children's Hospital of Chongqing Medical University/Ministry of Education Key Laboratory of Child Development and Disorders/National Clinical Research Center for Child Health and Disorders/China International Science and Technology Cooperation Base of Child Development and Critical Disorders/Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China Received: 2021-09-22  Revised: null  Online: null Supporting info