1. Rotterdam Ophthalmic Institute; Rotterdam The Netherlands
2. Department of Psychiatry; Section of Medical Psychology & Psychotherapy; Erasmus MC; Rotterdam The Netherlands
3. Monteban Value Services; Amerongen The Netherlands
4. Institute of Health Policy & Management; Erasmus University Rotterdam; Rotterdam The Netherlands
5. Rotterdam Eye Hospital; Rotterdam The Netherlands
6. Department of Ophthalmology; Erasmus MC; Rotterdam The Netherlands