Funding for this research was provided by:
Stichting Olim (D14800)
First Online: 21 March 2019
Compliance with Ethical Standards
: The authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study. The medical ethics committee CMO region Arnhem-Nijmegen, The Netherlands approved the study. The Dutch Trial Register Number is NTR5938.