1. Ophthalmology Clinic, University Hospital Ostrava, Ostrava, Czech Republic
2. Department of Ophthalmology, University Hospital of Cologne, Cologne, Germany
3. Department of Craniofacial Surgery, University of Ostrava Faculty of Medicine, Olomouc, Czech Republic
4. Department of Craniofacial Surgery, University of Ostrava Faculty of Medicine, Ostrava, Czech Republic
5. Center for Integrated Oncology (CIO) – Aachen – Bonn – Cologne – Düsseldorf, Cologne, Germany