1. Department of Ophthalmology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
2. Institute of Molecular and Clinical Ophthalmology Basel, Basel, Switzerland
3. Department of Ophthalmology, University of Cologne, Cologne, Germany
4. Hannover Medical School, Hannover, Germany
5. Privatpraxis Prof Jonas und Dr Panda-Jonas, Heidelberg, Germany