Karima Amaador1, Roselie Diederen2, Jeroen Coumou3, Josephine Vos1,4. 1. Department of Hematology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. 2. Department of Ophthalmology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands. 3. Department of Internal Medicine, Tergooi Ziekenhuis, Hilversum, The Netherlands. 4. Lymphoma and Myeloma Center Amsterdam (LYMMCARE), The Netherlands.