1. From University of Colorado Denver, Aurora, Colorado; Kaiser Permanente and Cedars-Sinai Medical Center, Los Angeles, California; Digestive CARE, South Florida Center of Gastroenterology, Wellington, Florida; University of California, San Diego, La Jolla, California; ID CARE, Hillsborough, New Jersey; Mercy Medical Center, Baltimore, Maryland; Borland-Groover Clinic, Jacksonville, Florida; Orlando Immunology Center, Orlando, Florida; Huntington Medical Research Institutes, Pasadena, California;
2. University of Pittsburgh, Pittsburgh, Pennsylvania; Gilead Sciences, Foster City, California; VA Long Beach Healthcare System, Long Beach, California; and Massachusetts General Hospital, Boston, Massachusetts.