Document is current

Article History

Received: 4 January 2018

Accepted: 20 February 2018

First Online: 3 March 2018

Compliance with Ethical Standards

:

: The authors declare that they have no conflicts of interest.

: 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. For this type of study, formal consent is not required.

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