A survey on sleeping status and its influencing factors in 18 997 middle-aged and elderly men in Beijing
Zhang Qing-hua
Jiang Zhi-xin
Sun Yu
Yi Zhi-yong
Lin Hu
Xia Ai-xiang
Tian Li
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Publication Date：2005-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 1-3 )