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Article History

Received: 3 December 2018

Revised: 10 January 2019

Accepted: 4 February 2019

First Online: 18 March 2019

Compliance with ethical standards

:

: The scientific guarantor of this publication is Dr. F. Clement.

: 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.

: Written informed consent was not required for this study because this study uses previously published data; therefore, no subjects were included in this study.

: Institutional Review Board approval was not required because this is a systematic review of previously published randomized controlled trials.

: • Multicenter study