Kim, Seong-Jang
Lee, Sang-Woo
Jeong, Shin Young
Pak, Kyoungjune
Kim, Keunyoung
Article History
Received: 14 June 2018
Accepted: 14 August 2018
First Online: 18 August 2018
Compliance with Ethical Standards
:
: The authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of this study.
: Institutional review board approval was not required because we only performed data analysis based on the published studies.
: Written informed consent was not required for this study because it is a meta-analysis based on the studies that have been published.
Free to read: This content has been made available to all.