1 Department of Ophthalmology, Faculty of Medicine and University, Hospital of Cologne, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany. sarah.zwingelberg@uk-koeln.de.
2 Department of Ophthalmology, Faculty of Medicine and University, Hospital of Cologne, University of Cologne, Kerpener Straße 62, 50937, Cologne, Germany.
3 University of Rostock, Department of Ophthalmology, Doberaner Str. 140, 18057, Rostock, Germany.