authors Li, Fu-Rong Shen, Dong Mao, Chen Wu, Xian-Bo Shi, Xiao-Ming Chen, Pei-Liang Lv, Yue-Bin Cheng, Xin Yang, Hai-Lian Yin, Zhao-Xue Zhao, Feng Zhang, Xi-Ru Li, Zhi-Hao
has subject area Activities of Daily Living Aged Aged, 80 and over Cohort Studies Female Humans Longitudinal Studies Male Vitamin D Vitamin D Deficiency