1. From the Department of Ophthalmology and the
2. Central Laboratory, University of Lu¨beck, Lu¨beck, Germany; the
3. UCL Institute of Ophthalmology, London, United Kingdom; the
4. Department of Ophthalmology, University of Go¨ttingen, Go¨ttingen, Germany; and the
5. Department of Ophthalmology, University of Wu¨rzburg, Wu¨rzburg, Germany.