1. Center for Marketing & Supply Chain Management, Nyenrode Business University, 3621 BG Breukelen, The Netherlands
2. Faculty of Social Sciences, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
3. Center for Oncology, Bravis Hospital, 4708 AE Roosendaal, The Netherlands
4. Janssen-Cilag B.V., Johnson & Johnson, 4837 DS Breda, The Netherlands