1. Department of Ophthalmology Thy-Mors Hospital, Thisted, Denmark
2. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
3. Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark
4. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark 4Department of Haematology, Aalborg University Hospital, Aalborg, Denmark