Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Department of Haematology, Aalborg University Hospital, Aalborg, Denmark. sfl@rn.dk.|Glaucoma and Retinal Neurodegeneration Group, UCL Institute of Ophthalmology, London, UK. m.cordeiro@ucl.ac.uk.