1. Division of Gastroenterology and Hepatology; Department of Medicine; San Antonio Military Medical Center; Fort Sam Houston TX USA
2. Department of Dermatology; San Antonio Military Medical Center; Fort Sam Houston TX USA
3. Division of Rheumatology; Department of Medicine; San Antonio Military Medical Center; Fort Sam Houston TX USA
4. Department of Pathology and Immunology; School of Medicine; Washington University; St. Louis MO USA