Affiliation: | 1. Department of Orthopedics, Handan Central Hospital, Handan, 056001, China 2. Department of Orthopedics, The First Hospital of Shijiazhuang City, Shijiazhuang, 050051, China 3. Department of Spine Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China
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