1. University of Miami School of Medicine; Department of Ophthalmology, Bascom Palmer Eye Institute; 11010 NW 30th St. Ste 104 Miami Florida USA 33172
2. Johns Hopkins Bloomberg School of Public Health; Department of Epidemiology; 615 N. Wolfe Street Baltimore Maryland USA 21205
3. The Medical City; Department of Ophthalmology; Suite 602, 6th Floor, Medical Arts Tower Ortigas Avenue Pasig City Philippines
4. University of the Philippines, Philippine General Hospital; Department of Ophthalmology and Visual Sciences; Manila Philippines