Text and Data Mining valid from 2018-05-31
Received: 6 November 2017
Accepted: 18 April 2018
First Online: 31 May 2018
Ethics approval and consent to participate
: As data of the review were used from published papers, evaluated and combined with methodology of systematic review, there was no ethical problem.
: We utilized data from published RCTs rather than from any individual person. Informed consents of individual person for publication in the review was not in need.
: The authors declare that they have no competing interests.
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