Funding for this research was provided by:
EuroQol Research Foundation (Grant number EQ Project 2016160)
Received: 17 August 2018
Accepted: 9 April 2019
First Online: 23 April 2019
Ethics approval and consent to participate
: This study was approved by the Medical Ethics Committee Brabant, the Netherlands. Patients needed to give permission for participation in the BIOS study. Informed consent forms were sent together with the T1 questionnaire.
: Not applicable
: This study was funded by the EuroQoL group (Grant number EQ Project 2016160), of which GJB is a member.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.