1. Department of Pharmacology; Rush University; Chicago; Illinois
2. Department of Internal Medicine; Section of Gastroenterology; Rush University Medical Center; Chicago; Illinois
3. Robert H. Lurie Comprehensive Cancer Center; Northwestern University; Chicago; Illinois
4. Royal (Dick) School of Veterinary Studies; Roslin Institute; University of Edinburgh; Midlothian; UK
5. Department of Internal Medicine; Division of Digestive Diseases; Rush University Medical Center; Chicago; Illinois