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Zhang XJ, Li QY, Wang Y, Xu HJ, Lin YN.Zhang XJ, et al.Sleep Breath. 2014 Dec;18(4):781-9. doi: 10.1007/s11325-014-0943-7. Epub 2014 Jan 29.Sleep Breath. 2014.PMID: 24474447
Xu HJ, Lan XF, Li QY, Zhou LN, Zhang XJ, Guo Q, Ni JH, Cao B.Xu HJ, et al.Sleep Breath. 2015 Mar;19(1):169-74. doi: 10.1007/s11325-014-0983-z. Epub 2014 May 8.Sleep Breath. 2015.PMID: 24807118
Sun J, Hu J, Tu C, Zhong A, Xu H.Sun J, et al. Among authors: xu h.PLoS One. 2015 Aug 18;10(8):e0135942. doi: 10.1371/journal.pone.0135942. eCollection 2015.PLoS One. 2015.PMID: 26284518Free PMC article.