@article {29932,
	title = {Spousal concordance in frailty predicting mental and functional health decline: A four-year follow-up study of older couples in urban and rural China},
	journal = {Journal of Clinical Nursing},
	year = {2021},
	publisher = {Wiley Online Library},
	isbn = {0962-1067},
	author = {Zhao, Xinyi and Li, Danyu and Quan Zhang and Liu, Huiying}
}
