Document is current

Article History

Received: 20 January 2021

Revised: 21 April 2021

Accepted: 30 April 2021

First Online: 18 May 2021

Declarations

:

: The scientific guarantor of this publication is Jung Hwan Baek.

: 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.

: One of the authors (Chong Hyun Suh) has significant statistical expertise.

: Written informed consent was not required for this study because it was a systematic review and meta-analysis using data from published studies.

: Institutional Review Board approval was not required because this study was a systematic review and meta-analysis using data from published studies.

: • Retrospective• Multicenter study