| Clinical Research Advantage, Inc./Desert Clinical Research, LLC. | Mesa | Arizona | 85213 | - |
| Xenoscience, Inc. | Phoenix | Arizona | 85004 | - |
| Clinical Research Advantage, Inc./Orange Grove Family Practice | Tucson | Arizona | 85741 | - |
| Principals Research Group, Inc. | Hot Springs | Arkansas | 71901 | - |
| KLR Business Group, Inc. dba Arkansas Clinical Research | Little Rock | Arkansas | 72205 | - |
| The Research Center of Southern California, LLC | Carlsbad | California | 92011 | - |
| Med Center | Carmichael | California | 95608 | - |
| T. Joseph Raoof MD, Inc./Encino Research Center | Encino | California | 91436 | - |
| Neurology Center of North Orange County | Fullerton | California | 92835 | - |
| Behavioral Research Specialists, LLC | Glendale | California | 91206 | - |
| Prime Care Clinical Research | Laguna Hills | California | 92656 | - |
| Collaborative Neuroscience Network, LLC. | Long Beach | California | 90806 | - |
| Synergy San Diego | National City | California | 91950 | - |
| Newport Beach Clinical Research Associates, Inc. | Newport Beach | California | 92663 | - |
| North County Clinical Research | Oceanside | California | 92054 | - |
| Medical Center for Clinical Research | San Diego | California | 92108 | - |
| CA Medical Clinic for Headache | Santa Monica | California | 90404 | - |
| Southern California Research LLC | Simi Valley | California | 93065 | - |
| Encompass Clinical Research | Spring Valley | California | 91978 | - |
| Alpine Clinical Research Center, Inc. | Boulder | Colorado | 80301 | - |
| Colorado Springs Neurological Associates | Colorado Springs | Colorado | 80907 | - |
| Delta Waves, Inc | Colorado Springs | Colorado | 80918 | - |
| Denver Neurological Research | Denver | Colorado | 80210 | - |
| Associated Neurologists, P.C. | Danbury | Connecticut | 06810 | - |
| Associated Neurolgists of Southern Connecticut, PC | Fairfield | Connecticut | 06824 | - |
| Sarkis Clinical Trials | Gainesville | Florida | 32607 | - |
| CPI MD Clinical | Hallandale | Florida | 33009 | - |
| Infinity Clinical Research, LLC | Hollywood | Florida | 33024 | - |
| Clinical Neuroscience Solutions, Inc. | Jacksonville | Florida | 32256 | - |
| Clinical Neuroscience Solutions, Inc. | Orlando | Florida | 32801 | - |
| Palm Beach Neurological Center/Advanced Research Consultants, Inc. | Palm Beach Gardens | Florida | 33410 | - |
| Meridien Research | Spring Hill | Florida | 34609 | - |
| Meridien Research | Tampa | Florida | 33634 | - |
| University of South Florida | Tampa | Florida | 33612 | - |
| Neurology Research Institute | West Palm Beach | Florida | 33407 | - |
| Midtown Neurology | Atlanta | Georgia | 30312 | - |
| Columbus Regional Research Institute | Columbus | Georgia | 31904 | - |
| Clinical Research Atlanta | Stockbridge | Georgia | 30281 | - |
| Great Lakes Clinical Trials | Chicago | Illinois | 60640 | - |
| Deaconess Clinic, Medical Office Building 1 Research Institute | Newburgh | Indiana | 47630 | - |
| Rowe Neurology Institute | Lenexa | Kansas | 66214 | - |
| College Park Family Care Center Physicians Group - Neurology Research Department | Overland Park | Kansas | 66212 | - |
| Kansas Institute of Research | Overland Park | Kansas | 66211 | - |
| Kentucky Pediatric/Adult Research | Bardstown | Kentucky | 40004 | - |
| Pharmasite Research, Inc. | Baltimore | Maryland | 21208 | - |
| Boston Clinical Trials | Boston | Massachusetts | 02131 | - |
| Northeast Medical Research Associates, Inc | South Dartmouth | Massachusetts | 02747 | - |
| MedVadis Research Corporation | Watertown | Massachusetts | 02472 | - |
| Michigan Head-Pain & Neurological Institute | Ann Arbor | Michigan | 48104 | - |
| Beyer Research | Kalamazoo | Michigan | 49009 | - |
| Clinical Research Institute, Inc. | Minneapolis | Minnesota | 55402 | - |
| Olive Branch Family Medical Center | Olive Branch | Mississippi | 38654 | - |
| Clinvest Research, LLC | Springfield | Missouri | 65810 | - |
| Quality Clinical Research, Inc. | Omaha | Nebraska | 68114 | - |
| Clinical Research Advantage, Inc./Diagnostic Center of Medicine - Durango | Las Vegas | Nevada | 89117 | - |
| Albuquerque Clinical Trials, Inc. | Albuquerque | New Mexico | 87102 | - |
| Albuquerque Neuroscience, Inc. | Albuquerque | New Mexico | 87109 | - |
| Regional Clinical Research, Inc. | Endwell | New York | 13760 | - |
| Central New York Clinical Research | Manlius | New York | 13104 | - |
| Rochester Clinical Research, Inc. | Rochester | New York | 14609 | - |
| Neurology Associates, P.A. | Hickory | North Carolina | 28602 | - |
| Wake Research Associates, LLC | Raleigh | North Carolina | 27612 | - |
| PMG Research of Winston-Salem, LLC. | Winston-Salem | North Carolina | 27103 | - |
| Neuro-Behavioral Clinical Research, Inc. | Canton | Ohio | 44718 | - |
| CTI Clinical Research Center | Cincinnati | Ohio | 45212 | - |
| Aventiv Research, Inc | Columbus | Ohio | 43213 | - |
| Ohio Clinical Research, LLC | Lyndhurst | Ohio | 44124 | - |
| Lynn Health Science Institute | Oklahoma City | Oklahoma | 73112 | - |
| MPH IPS Research Company | Oklahoma City | Oklahoma | 73103 | - |
| NPC Research | Oklahoma City | Oklahoma | 73109 | - |
| Oregon Center For Clinical Investigations Inc. (OCCI, Inc.) | Portland | Oregon | 97214 | - |
| Summit Research Network | Portland | Oregon | 97210 | - |
| Clinical Research of Philadelphia, LLC | Philadelphia | Pennsylvania | 19114 | - |
| BTC of Lincoln | Lincoln | Rhode Island | 02865 | - |
| WR-ClinSearch, LLC | Chattanooga | Tennessee | 37421 | - |
| Holston Medical Group | Kingsport | Tennessee | 37660 | - |
| Clinical Neuroscience Solutions, Inc. | Memphis | Tennessee | 38119 | - |
| FutureSearch Trials of Neurology | Austin | Texas | 78731 | - |
| Tekton Research, Inc. | Austin | Texas | 78745 | - |
| FutureSearch Trials of Dallas, LP | Dallas | Texas | 75231 | - |
| Red Star Research, LLC | Lake Jackson | Texas | 77566 | - |
| Clinical Trials Texas, Inc | San Antonio | Texas | 78229 | - |
| Road Runner Research, Ltd. | San Antonio | Texas | 78249 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic Draper | Draper | Utah | 84020 | - |
| Granger Medical Clinic-Riverton | Riverton | Utah | 84065 | - |
| Highland Clinical Research | Salt Lake City | Utah | 84124 | - |
| Optimum Clinical Research, Inc. | Salt Lake City | Utah | 84102 | - |
| Tidewater Integrated Medical Research | Virginia Beach | Virginia | 23454 | - |
| Northwest Clinical Research Center | Bellevue | Washington | 98007 | - |
| The Polyclinic Madison Center | Seattle | Washington | 98104 | - |