@article {29931,
	title = {Longitudinal Impact of Frailty States and Sleep Duration on Subsequent Depressive Symptoms of Older Adults},
	journal = {Journal of the American Geriatrics Society},
	volume = {69},
	year = {2021},
	pages = {1003-1011},
	publisher = {Wiley Online Library},
	isbn = {0002-8614},
	author = {Liu, Huiying and Li, Danyu and Zhao, Xinyi* and Fang, Boye and Quan Zhang and Li, Tingyu}
}
