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Cai C, Qiu J, Qiu G, Chen Y, Song Z, Li J, Gong X.Cai C, et al.BMC Pulm Med. 2017 Dec 13;17(1):199. doi: 10.1186/s12890-017-0524-1.BMC Pulm Med. 2017.PMID: 29237426Free PMC article.
Xi JJ, Yang GH, Liu YN, Qiu JJ, Gong XL, Yan JB, Zeng F.Xi JJ, et al. Among authors: qiu jj.Cell Biol Int. 2021 Jul;45(7):1383-1392. doi: 10.1002/cbin.11560. Epub 2021 Apr 23.Cell Biol Int. 2021.PMID: 33527608