1 Department of Ophthalmology, Townsville University Hospital, Douglas, QLD, Australia. Electronic address: alihaider@live.com.au.
2 Department of Clinical Haematology and Bone Marrow Transplantation, Townsville University Hospital, Douglas, QLD, Australia; James Cook University School of Medicine and Dentistry, Douglas, QLD, Australia.
3 Department of Ophthalmology, Townsville University Hospital, Douglas, QLD, Australia.