1. Department of Ophthalmology, University of Bonn, Bonn, Germany
2. The Nuffield Laboratory of Ophthalmology, Sleep and Circadian Neuroscience Institute, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom
3. Oxford Eye Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom
4. Institute for Medical Biometry, Informatics and Epidemiology, University Hospital Bonn, Bonn, Germany