Leiden University, Leiden University, Leiden University, Elisabeth-Tweesteden Hospital, University of Groningen, Tilburg University, University of Groningen, Medical Center Leeuwarden, Jeroen Bosch Hospital, Antonius Hospital, Groene Hart Ziekenhuis, Alrijne Hospital, Zuyderland Medical Centre, Rijnstate Hospital, Canisius Wilhelmina Hospital, Elisabeth-Tweesteden Hospital and Leiden University