Funding for this research was provided by:
Universitair Medisch Centrum Groningen
Text and Data Mining valid from 2018-04-11
Received: 2 February 2018
Accepted: 6 February 2018
First Online: 11 April 2018
Compliance with ethical standards
: All authors declare that they have no conflict of interest with respect to this study.
: This article does not contain any studies with animals or human participants performed by any of the authors.