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Article History

Received: 9 April 2021

Revised: 9 June 2021

Accepted: 16 June 2021

First Online: 29 July 2021

Declarations

:

: The scientific guarantor of this publication is Chang Min Park.

: 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 has significant statistical expertise (Hyunsook Hong, Ph.D.; Medical Research Collaborating Center)

: Written informed consent was not required because this study is systematic review and meta-analysis.

: Institutional Review Board approval was not required because this study is systematic review and meta-analysis.

: This study is systematic review of the literature and meta-analysis of all their patients.

: • retrospective• diagnostic or prognostic study• multicenter study