1. International Clinical Research Institute Overland Park Kansas U.S.A
2. Johns Hopkins University School of Medicine Baltimore Maryland U.S.A
3. Temple University School of Medicine Philadelphia Pennsylvania U.S.A
4. Association of Chronic Pain Patients Naples Florida U.S.A
5. NEMA Research Inc. Naples Florida U.S.A
6. Palliative Care Center Silicon Valley and Hospice of the Valley San Jose California U.S.A
7. Salix Pharmaceuticals Inc. Raleigh North Carolina U.S.A