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