Funding for this research was provided by:
Text and Data Mining valid from 2018-01-18
Received: 26 September 2017
Accepted: 18 December 2017
First Online: 18 January 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Committees and the patients gave both verbal and written consent to participate.
: All authors gave their consent for publication.
: The authors declare that they have no competing interests.