Analysis of clinical characteristics and risk factors of poor prognosis in the 124 extremely premature infants
LIU Ying-ying, JIANG Qian-nan, TIAN Bao-li, LIU Xiu-xiang
Chinese Journal of Child Health Care . 2022, (6): 660 -663 .  DOI: 10.11852/zgetbjzz2021-0585


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