Text and Data Mining valid from 2019-10-18
Received: 28 February 2019
Accepted: 9 October 2019
First Online: 18 October 2019
Compliance with ethical standards
: The authors declare that they have no competing interest.
: Prof. David I. Watson received funding support for RCTs included in this meta-analysis in the form of Research Project Grants from the National Health and Medical Research Council (NHMRC) of Australia - Grant nos. 375111 and 1022722. Mr Alexandros Andreou, Prof. Dimitrios Mavridis, Prof. Nader K. Francis, and Dr. Stavros A. Antoniou do not have any conflicts of interest or financial ties to disclose.