1 Ophthalmology Unit, Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana.
2 Ophthalmology Unit, Department of Surgery, University of Ghana Medical School, College of Health Sciences, Korle-Bu Teaching Hospital, Accra, Ghana.
3 Endocrine Unit, Department of Medicine, University of Ghana Medical School, College of Health Sciences, University of Ghana Medical School, Accra, Ghana.
4 Neurosurgical Unit, Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana.
5 University of Ghana Dental School, College of Health Sciences, Korle-Bu Teaching Hospital, Accra, Ghana.