Maintaining healthy sleep patterns and frailty transitions: a prospective Chinese study. - Zhu, Yunqing; Fan, Junning; Lv, Jun; Guo, Yu; Pei, Pei; Yang, Ling; Chen, Yiping; Du, Huaidong; Li, Feifei; Yang, Xiaoming; Avery, Daniel; Chen, Junshi; et al. (BMC Medicine, 2022)