1. The Regenerative Medicine Unit, Department of Medical Biochemistry, Oslo University Hospital, Ullevål, 0450 Oslo, Norway
2. The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Ullevål, 0450 Oslo, Norway
3. Institute of Oral Biology, Faculty of Dentistry, University of Oslo, 0372 Oslo, Norway
4. Department of Plastic and Reconstructive Surgery, Oslo University Hospital, 0372 Oslo, Norway
5. Department of Ophthalmology, Oslo University Hospital, 0450 Oslo, Norway
6. Department of Ophthalmology, Sørlandet Hospital Arendal, 4838 Arendal, Norway
7. Department of Ophthalmology, Vestre Viken Hospital Trust, 3004 Drammen, Norway
8. The Norwegian Dry Eye Clinic, 0369 Oslo, Norway
9. Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo, 0455 Oslo, Norway