title: Authors' reply.
authors.affiliation: Beijing, China.
authors.forename: Guan-Yang
authors.initials: GY
authors.lastname: Song
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.forename: Xu
authors.initials: X
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Feng
mesh_terms: D016118:Anterior Cruciate Ligament / Q000601:surgery*; D059549:Anterior Cruciate Ligament Reconstruction / Q000379:methods*; D006801:Humans; D059351:Organ Sparing Treatments / Q000379:methods*