1. Department of Ophthalmology; University of Amsterdam; Amsterdam The Netherlands
2. Department of Ophthalmology; University Hospitals Leuven; Leuven Belgium
3. Department of Ophthalmology and Visual Sciences; University of British Columbia; Vancouver British Columbia Canada
4. Department of Ophthalmology; Mayo Clinic; Rochester New York USA
5. Department of Ophthalmology; Columbia University; College of Physicians and Surgeons; New York New York USA
6. Department of Medical Psychology; University of Amsterdam; Amsterdam The Netherlands