Zwart, Fenny S.
Vissers, Constance Th. W. M.
Maes, Joseph H. R.
Article History
First Online: 9 March 2018
Compliance with Ethical Standards
:
: All authors declare no conflicts of interest.
: All procedures performed were approved by the local ethical committee (Radboud University, Nijmegen, ECSW2014-1003-207) and in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.