Systematic review and meta-analysis of vitamin D deficiency in different pregnancy on preterm birth: Deficiency in middle pregnancy might be at risk

por Lian, Rui-Han, Qi, Ping-An, Yuan, Tao, Yan, Pei-Jing, Qiu, Wen-Wen, Wei, Ying, Hu, Ya-Guang, Yang, Ke-Hu, Yi, Bin
Publicado 2021