1. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
2. Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway
3. Department of Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway
4. Department of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
5. Department of Ophthalmology, Oslo University Hospital, Oslo, Norway
6. Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway
7. National Centre for Optics, Vision and Eye Care, Department of Optometry, Radiography and Lighting Design, Faculty of Health Sciences, University of South-Eastern Norway, Kongsberg, Norway