1. Vice President Scientific Affairs, PRA Health Sciences, Salt Lake City, Utah
2. Director, Pain Trials Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
3. Medical Director, Principal Investigator, Northwest Clinical Research Center, Bellevue, Washington
4. Adjunct Professor of Psychiatry, Duke University Medical Center, Durham, North Carolina
5. Salix Pharmaceuticals, Raleigh, North Carolina, USA