Sleep quality of rural elderly people and associated factors in Chizhou City, Anhui Province
CAO Yin-huan, HU Qian-qi, CHEN Yuan-jing, HE Qian, SHEN Xian-qing, HUANG Fen
S China J Prev Med . 2016, (5): 417 -420 .  DOI: 10.13217/j.scjpm.2016.0417

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