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Xiong C, Li T, Kang H, Hu H, Han J, Xu F.Xiong C, et al. Among authors: xu f.Eur Spine J. 2019 Jan;28(1):78-86. doi: 10.1007/s00586-018-5655-4. Epub 2018 Jun 16.Eur Spine J. 2019.PMID: 29909552
Wei S, Fan D, Han F, Tang M, Kong C, Xu F, Cai X.Wei S, et al. Among authors: xu f.BMC Musculoskelet Disord. 2021 Mar 18;22(1):289. doi: 10.1186/s12891-021-04165-0.BMC Musculoskelet Disord. 2021.PMID: 33736616Free PMC article.