1. Benchmark Research, Austin, Texas
2. Advance Medical Research Center, Miami, Florida
3. Hope Clinical Research, Canoga Park, California
4. DelRicht Clinical Research, New Orleans, Louisiana
5. West Houston Clinical Research Service, Houston, Texas
6. Ear, Nose and Throat Associates of Texas, McKinney
7. Kentucky Pediatric/Adult Research, Bardstown
8. Carolina ENT Clinic (Centri Inc), Orangeburg, South Carolina