1. Department of Surgery; University of Texas Southwestern Medical Center at Dallas; Dallas TX
2. Department of Ophthalmology; University of Texas Southwestern Medical Center at Dallas; Dallas TX
3. Gastroenterology Division HSJD; University of Costa Rica; San Pedro Montes de Oca Costa Rica
4. Texas Digestive Disease Consultants; Keller TX
5. Department of Digestive and Liver Diseases Division; University of Texas Southwestern Medical Center at Dallas; Dallas TX