1. Department of Genetic Epidemiology, University of Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg, Germany
2. Department of Mathematics, Stockholm University, Albanovägen 28, Stockholm, Sweden
3. Institute of Human Genetics, University of Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg, Germany
4. Institute of Clinical Human Genetics, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg, Germany
5. Department of Ophthalmology, University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, Regensburg, Germany