1. Institute of Anatomy, University of Duisburg-Essen Faculty of Medicine, Essen, Germany.
2. Eye Clinic of Tartu University Hospital, Tartu, Estonia.
3. Duke Eye Center, Durham, North Carolina.
4. Department of Ophthalmology, Erlangen University Hospital, Erlangen, Germany.
5. Department of Ophthalmology, Essen University Hospital, Essen, Germany.
6. Institute of Anatomy and Cellular Biology, Julius-Maximilians-University, Würzburg, Germany.