Text and Data Mining valid from 2018-06-19
First Online: 19 June 2018
Compliance with Ethical Standards
: Paola Mian, Karel Allegaert, Isabel Spriet, Dick Tibboel and Mirko Petrovic declare that they have no conflicts of interest that might be relevant to the contents of this manuscript.
: Isabel Spriet is partially funded by the Clinical Research Fund of the University Hospitals Leuven, Belgium.