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Chinese
Demographic-based Analysis of Sleep Quality in Elderly Smokers in Hebei Province
WANG Wenhui，LIU Xiao，ZHANG Lili，ZHANG Yunshu，LI Keqing
Chinese General Practice . 2021, (
4
): 467 -472 . DOI: 10.12114/j.issn.1007-9572.2021.00.019
