title: Letter to the Editor: Dynamic Cervical Implant.
authors.affiliation: West China Hospital, Sichuan University, Chengdu, Sichuan, China;|Sichuan Provincial People's Hospital, Chengdu, Sichuan, China.
authors.forename: Jinping
authors.initials: J
authors.lastname: Liu
authors.affiliation: Sichuan Provincial People's Hospital, Chengdu, Sichuan, China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Feng