1 Department of Ophthalmology, Saarland University Medical Center, Kirrberger Str. 100, 66421 Homburg/Saar, Germany. Electronic address: zaynab.khattabi@uks.eu.
2 Department of Oncology, Haematology, Clinical Immunology and Rheumatology, Saarland University Medical Center, Kirrberger Str. 100, 66421 Homburg/Saar, Germany.
3 Department of Ophthalmology, Saarland University Medical Center, Kirrberger Str. 100, 66421 Homburg/Saar, Germany.