Document is current

Article History

Received: 8 January 2018

Accepted: 21 January 2018

First Online: 7 February 2018

Compliance with ethical standards

:

: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national 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.