Text and Data Mining valid from 2018-01-20
Received: 3 October 2017
Accepted: 14 January 2018
First Online: 20 January 2018
Compliance with ethical standards
: No potential conflicts of interest to disclose.
: 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. Informed consent or substitute for it was obtained from all patients for being included in the study.