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Article History

Received: 18 April 2017

Accepted: 14 January 2018

First Online: 17 May 2018

Compliance with ethical standards

:

: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest in the subject matter or materials discussed in this manuscript.

: All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments.

: Informed consent was obtained from all individual participants included in the study.