1. Department of Ophthalmology; Centre of Head and Orthopedics; Rigshospitalet-Glostrup; Glostrup Denmark
2. Institute of Clinical Medicine; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
3. Department of Ophthalmology; Zealand University Hospital; Naestved Denmark
4. Odense Eye Clinic; Odense Denmark
5. Skanderborg Eye Clinic; Skanderborg Denmark
6. Department of Ophthalmology; Aarhus University Hospital NBG; Aarhus Denmark