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Xu, Lin, Chao Qiang Jiang, Tai Hing Lam, Bin Liu, Ya Li Jin, Tong Zhu, Wei Sen Zhang, Kar Keung Cheng, and G. Neil Thomas. Short or Long Sleep Duration Is Associated With Memory Impairment in Older Chinese: The Guangzhou Biobank Cohort Study. Associated Professional Sleep Societies, LLC, 2011.

Xu, Lin, et al. Short or Long Sleep Duration Is Associated With Memory Impairment in Older Chinese: The Guangzhou Biobank Cohort Study. Associated Professional Sleep Societies, LLC, 2011.