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Hu Z, Qin L, Xu H.Hu Z, et al.Int J Environ Res Public Health. 2017 Apr 14;14(4):417. doi: 10.3390/ijerph14040417.Int J Environ Res Public Health. 2017.PMID: 28420105Free PMC article.Clinical Trial.
Luo B, Zhang J, Hu Z, Gao F, Zhou Q, Song S, Qin L, Xu H.Luo B, et al. Among authors: hu z.BMJ Open. 2018 Jan 23;8(1):e015747. doi: 10.1136/bmjopen-2016-015747.BMJ Open. 2018.PMID: 29362243Free PMC article.
Xu H, Tang L, Hu Z, Gao F, Yang Y, Qin L, Luo BA.Xu H, et al. Among authors: hu z.BMJ Open. 2018 Apr 12;8(4):e019836. doi: 10.1136/bmjopen-2017-019836.BMJ Open. 2018.PMID: 29654016Free PMC article.