1. University of Puerto Rico, Medical Sciences Campus, Department of Ophthalmology, Paseo Dr. Jose Celso Barbosa, San Juan 00921, USA
2. Ponce Health Sciences University School of Medicine, 388 Zona Industrial Reparada 2, Ponce, PR 00716, USA
3. Emanuelli Research and Development Center, 452 Dr R Rivera Aulet Avenue, Suite 45 Arecibo, PR 00612-4368, USA
4. Department of Ophthalmology & Visual Sciences, Case Western Reserve University, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH 44106, USA