authors Liu, Minhui Hou, Tianxue Manka Nkimbeng, PhD, MPH, RN Li, Yuxiao Taylor, Janiece L Sun, Xiaocao Tang, Siyuan Szanton, Sarah L
has subject area Aged Aged, 80 and over Cohort Studies Cross-Sectional Studies Depression Female Frail Elderly Frailty Humans Medicare Pain Sleep Initiation and Maintenance Disorders United States