Text and Data Mining valid from 2018-03-08
Received: 18 September 2017
Accepted: 22 January 2018
First Online: 8 March 2018
Compliance with Ethical Standards
: Ethical clearance certificate obtained from institutional review board. All procedures performed in studies involving human participants were in accordance with ethical standards of institutional research committee and with 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent obtained from the involved human participants.