Application of different doses of vitamin D supplementation in premature infants
LIU Yi-rong, ZENG Chun-ying, ZHANG Wen-jing, LIU Dong, CAI Yue-ju
Chinese Journal of Child Health Care . 2021, (10): 1142 -1144 .  DOI: 10.11852/zgetbjzz2020-1807


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