Text and Data Mining valid from 2015-11-05
Received: 15 June 2015
Accepted: 18 October 2015
First Online: 5 November 2015
Compliance with ethical standards
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Approval for this project was obtained before study commencement from the Institutional Review Board (Service Evaluation 3407).
: The authors declare that they have no conflict of interest.