Article History
Received: 14 November 2020
Revised: 1 January 2021
Accepted: 18 February 2021
First Online: 25 March 2021
Declarations
:
: The scientific guarantor of this publication is Xingang Cui.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Informed consent was obtained from all participants
: Institutional Review Board approval was obtained.
: Some subjects or cohorts have been previously reported in journal articles (Eur Spine J; 29: 1490-1498; Spine (Phila Pa 1976); 42: 113-121).
: • retrospective• diagnostic or prognostic study• performed at one institution