1. Health Economics and Market Access, Synergus AB, Danderyd (Stockholm), Sweden;
2. Health Economics, Synergus AB, Danderyd (Stockholm), Sweden;
3. Dienst Algemene, Vaat- en Kinderheelkunde, AZ Sint-Jan Brugge-Oostende AV, campus Sint-Jan , Ruddershove 10, 8000 Brugge, Belgium