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Article History

Received: 15 April 2016

Accepted: 26 March 2018

First Online: 29 March 2018

Compliance with Ethical Standards 

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: The authors hereby wish to state that this paper does not have any financial and personal relationships with other people or organizations that could inappropriately influence (bias) their work.

: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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