1. Department of Educational Development and Research , Faculty of Health, Medicine and Life Sciences, , Universiteitsingel 60, P.O. Box 616, 6229 ER Maastricht , Netherlands
2. Maastricht University , Faculty of Health, Medicine and Life Sciences, , Universiteitsingel 60, P.O. Box 616, 6229 ER Maastricht , Netherlands
3. Department of Paediatrics, Horacio Oduber Hospital , Horacio E. Oduber Boulevard #1, Oranjestad Aruba , Netherlands