Funding for this research was provided by:
Sixth Framework Programme (LSHM-CT-2004-503039)
Text and Data Mining valid from 2018-11-16
Received: 18 July 2018
Accepted: 1 November 2018
First Online: 16 November 2018
Compliance with Ethical Standard
: The protocol of the study was approved by the Local Ethics Committee.
: The authors declare that they have no competing interests.