1 Isala Academy, Department of Medical Education and Faculty Development, Isala Hospital, Zwolle, The Netherlands. p.l.p.brand@isala.nl.
2 Lifelong Learning Education and Assessment Research Network (LEARN), University of Groningen and University Medical Centre, Groningen, The Netherlands. p.l.p.brand@isala.nl.
3 Department of Pediatrics, Maastricht University Medical Centre, Maastricht, the Netherlands.
4 Department of Pediatrics, Spaarne Gasthuis, Hoofddorp/ Haarlem, The Netherlands.
5 Department of Development and Regeneration, KU Leuven, Leuven, Belgium.