Text and Data Mining valid from 2018-03-21
Received: 23 January 2018
Accepted: 12 March 2018
First Online: 21 March 2018
Ethics approval and consent to participate
: This research was reviewed and approved by Muğla Sıtkı Koçman University ethical board with 6(143) protocol number in 5.1.2017.
: Data set in this meta-analysis study involves deidentified and anonymized data for this reason consent for publication is not applicable.
: The authors declare that they have no competing interests.
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