1 Department of Medicine, Eric Williams Medical Sciences Complex, Mt. Hope, Trinidad, WI, Trinidad and Tobago.
2 Department of Clinical Medical Sciences, University of the West Indies (St. Augustine), Eric Williams Medical Sciences Complex, Mt. Hope, Trinidad, WI, Trinidad and Tobago.
3 Department of Ophthalmology, Sangre Grande Hospital, Sangre Grande, Trinidad, WI, Trinidad and Tobago.