Spijkerman, Roy http://orcid.org/0000-0002-3620-5433
Bulthuis, Lauren C. M.
Hesselink, Lillian
Nijdam, Thomas M. P.
Leenen, Luke P. H.
de Bruin, Ivar G. J. M.
Article History
Received: 29 October 2019
Accepted: 25 January 2020
First Online: 11 February 2020
Conflict of interest
: The authors declare that they have no conflict of interest.
: This research study was conducted retrospectively from data obtained for clinical purposes. We consulted extensively with the Human Investigation Committee (IRB) of the University Medical Center Utrecht who determined that our study did not need ethical approval (protocol number 18–789).
: In line with the academic hospital policy, an opt-out procedure is in place for the use of patient data for research purposes. Therefore, no informed consent was required, according to the local IRB.