Vitamin D status and its relationship to the time of outdoor activities and the body mass index in 0~6 years old children
QIN Zhen-ying,LIANG Guan-yu,HU You-fang,FU Yan-rong,YANG Zi,ZHAO Yan,QIN Rui
journal1 . 2017, (4): 334 -337 .  DOI: 10.11852/zgetbjzz2017-25-04-04