Physical frailty identification using machine learning to explore the 5-item FRAIL scale, Cardiovascular Health Study index, and Study of Osteoporotic Fractures index oleh Chen-Cheng Yang, Chen-Cheng Yang, Chen-Cheng Yang, Po-Hong Chen, Cheng-Hong Yang, Chia-Yen Dai, Kuei-Hau Luo, Tzu-Hua Chen, Hung-Yi Chuang, Hung-Yi Chuang, Hung-Yi Chuang, Chao-Hung Kuo