| Radiant Research, Inc. | Birmingham | Alabama | 35211 | - |
| East Family Physicians PC/Radiant Research, Inc. | Chandler | Arizona | 85224 | - |
| Desert Clinical Research /Radiant Research, Inc. | Mesa | Arizona | 85213 | - |
| Central Phoenix Medical Clinic | Phoenix | Arizona | 85020 | - |
| Xenoscience, Inc. | Phoenix | Arizona | 85004 | - |
| Orange Grove Family Practice/Radiant Research, Inc. | Tucson | Arizona | 85741 | - |
| Radiant Research Inc. | Tucson | Arizona | 85712 | - |
| Principals Research Group, Inc. | Hot Springs | Arkansas | 71901 | - |
| Arkansas Clinical Research | Little Rock | Arkansas | 72205 | - |
| Anaheim Clinical Trials, LLC | Anaheim | California | 92801 | - |
| Axiom Research | Apple Valley | California | 92307 | - |
| Hope Clinical Research | Canoga Park | California | 91303 | - |
| Med Center Medical Clinic Carmichael | Carmichael | California | 95608 | - |
| Axiom Research, LLC | Colton | California | 92324 | - |
| Encino Research Center/T Joseph Raoof MD Inc | Encino | California | 91436 | - |
| Pharmacology Research Institute | Encino | California | 91316 | - |
| California Headache and Balance Center | Fresno | California | 93720 | - |
| Neuro-Pain Medical Center, Inc | Fresno | California | 93710 | - |
| Neurology Center of North Orange County | Fullerton | California | 92835 | - |
| Behavioral Research Specialists, LLC | Glendale | California | 91206 | - |
| Sun Valley Research Center | Imperial | California | 92251 | - |
| Grossmont Center For Clinical Research | La Mesa | California | 91942 | - |
| Collaborative Neuroscience Network, LLC | Long Beach | California | 90806 | - |
| Pharmacology Research Institute | Los Alamitos | California | 90270 | - |
| Pacific Institute of Medical Research | Los Angeles | California | 90024 | - |
| Synergy San Diego | National City | California | 91950 | - |
| Newport Beach Clinical Research Associates, Inc. | Newport Beach | California | 92663 | - |
| Pharmacology Research Institute | Newport Beach | California | 92660 | - |
| Rancho Cucamonga Clinical Research | Rancho Cucamonga | California | 91730 | - |
| Desert Valley Research | Rancho Mirage | California | 92270 | - |
| George J Rederich MD, Inc. | Redondo Beach | California | 90277 | - |
| Artemis Institute For Clinical Research | San Diego | California | 92103 | - |
| Medical Center for Clinical Research | San Diego | California | 92108 | - |
| California Medical Clinic for Headache | Santa Monica | California | 90404 | - |
| Southern California Research Center | Simi Valley | California | 93065 | - |
| Encompass Clinical Research | Spring Valley | California | 91978 | - |
| Radiant Research | Vista | California | 92083 | - |
| Alpine Clinical Research Center | Boulder | Colorado | 80301 | - |
| Clinicos LLC | Colorado Springs | Colorado | 80904 | - |
| Colorado Springs Neurological Associates | Colorado Springs | Colorado | 80907 | - |
| Delta Waves, Inc | Colorado Springs | Colorado | 80918 | - |
| Denver Neurological Research | Denver | Colorado | 80210 | - |
| Summit Headache and Neurologic Institute | Englewood | Colorado | 80113 | - |
| Advanced Neurosciences Research | Fort Collins | Colorado | 80528 | - |
| Associated Neurologists, PC | Danbury | Connecticut | 06810 | - |
| Associated Neurologists of Southern Connecticut, PC | Fairfield | Connecticut | 06824 | - |
| Aventura Neurological Associates, PA | Aventura | Florida | 33180 | - |
| Clinical Research South Florida | Coral Gables | Florida | 33134 | - |
| Avail Clinical Research | DeLand | Florida | 32720 | - |
| Sarkis Clinical Trials | Gainesville | Florida | 32607 | - |
| Wilks & Safirstein MD PA D/B/A MD Clinical | Hallandale | Florida | 33009 | - |
| Broward Research | Hollywood | Florida | 33024 | - |
| Infinity Clinical Research | Hollywood | Florida | 33021 | - |
| Clinical Neuroscience Solutions Inc | Jacksonville | Florida | 32256 | - |
| Health Awareness, Inc. | Jupiter | Florida | 33458 | - |
| Neurology Associates, P.A. | Maitland | Florida | 32751 | - |
| LCC Medical Research | Miami | Florida | 33126 | - |
| Well Pharma Medical Research | Miami | Florida | 33143 | - |
| Panax Clinical Research | Miami Lakes | Florida | 33014 | - |
| Suncoast Clinical Research, Inc. | New Port Richey | Florida | 34652 | - |
| Renstar Medical Research | Ocala | Florida | 34471 | - |
| Sensible Healthcare, LLC | Ocoee | Florida | 34761 | - |
| Clinical Neuroscience Solutions, Inc - Memphis, TN | Orlando | Florida | 32801 | - |
| Palm Beach Neurological Center / Advanced Research Consultants, Inc. | Palm Beach Gardens | Florida | 33410 | - |
| Qps Mra, Llc | South Miami | Florida | 33143 | - |
| Meridien Research | Spring Hill | Florida | 34609 | - |
| Meridien Research | Tampa | Florida | 33634 | - |
| University of South Florida | Tampa | Florida | 33612 | - |
| Neurology Research Institute Palm Beach | West Palm Beach | Florida | 33407 | - |
| Palm Beach Research Center | West Palm Beach | Florida | 33409 | - |
| Midtown Neurology | Atlanta | Georgia | 30312 | - |
| NeuroTrials Research Inc | Atlanta | Georgia | 30342 | - |
| Columbus Regional Research Institute | Columbus | Georgia | 31904 | - |
| Clinical Research Atlanta | Stockbridge | Georgia | 30281 | - |
| Advanced Clinical Research | Meridian | Idaho | 83642 | - |
| Cedar Crosse Research Center | Chicago | Illinois | 60607 | - |
| Great Lakes Clinical Trials, LLC | Chicago | Illinois | 60640 | - |
| Michigan Ave. Internists /Radiant Research, Inc. | Chicago | Illinois | 60604 | - |
| Robbins Headache Clinic | Riverwoods | Illinois | 60015 | - |
| Deaconess Clinic Inc. | Evansville | Indiana | 47713 | - |
| Josephson Wallack Munshower Neurology, P.C. | Indianapolis | Indiana | 46256 | - |
| Rowe Neurology Institute | Lenexa | Kansas | 66214 | - |
| College Park Family Care Center Physicians Group- Neurology Research Dept | Overland Park | Kansas | 66210 | - |
| Kansas Institute of Research | Overland Park | Kansas | 66211 | - |
| Kentucky Pediatric Research Inc | Bardstown | Kentucky | 40004 | - |
| L-MARC Research Center | Louisville | Kentucky | 40213 | - |
| Norton Neurology Services | Louisville | Kentucky | 40207 | - |
| Pharma Site Research | Baltimore | Maryland | 21208 | - |
| Seton Medical Group | Baltimore | Maryland | 21228 | - |
| Boston Clinical Trials Inc | Boston | Massachusetts | 02131 | - |
| BTC of New Bedford | New Bedford | Massachusetts | 02470 | - |
| Northeast Medical Research Associates, Inc. | North Dartmouth | Massachusetts | 02747 | - |
| Beacon Clinical Research, LLC | Quincy | Massachusetts | 02169 | - |
| Medvadis Research Corporation | Watertown | Massachusetts | 02472 | - |
| New England Regional Headache Center | Worcester | Massachusetts | 01605 | - |
| Michigan Head Pain & Neurological Institute | Ann Arbor | Michigan | 48104 | - |
| Quest Research Institute | Farmington Hills | Michigan | 48334 | - |
| Women's Health Care Specialists | Kalamazoo | Michigan | 49009 | - |
| The Minneapolis Clinic of Neurology, Ltd. | Golden Valley | Minnesota | 55422 | - |
| Clinical Research Institute, Inc. | Minneapolis | Minnesota | 55402 | - |
| Olive Branch Family Medical Center | Olive Branch | Mississippi | 38654 | - |
| The Headache Center | Ridgeland | Mississippi | 39157 | - |
| Clinvest | Springfield | Missouri | 65807 | - |
| Prairie Fields Family Medicine | Fremont | Nebraska | 68025 | - |
| Clinical Research Advantage, Inc/Synexus USA | Omaha | Nebraska | 68114 | - |
| Meridian Clinical Research | Omaha | Nebraska | 68134 | - |
| Quality Clinical Research, Inc. | Omaha | Nebraska | 68114 | - |
| Diagnostic Center of Medicine - Durango / Radiant Research, Inc. | Las Vegas | Nevada | 89117 | - |
| Princeton Medical Institute | Princeton | New Jersey | 08540 | - |
| Princeton Center for Clinical Research | Skillman | New Jersey | 08558 | - |
| Bio Behavioral Health | Toms River | New Jersey | 08755 | - |
| Albuquerque Clinical Trials, Inc. | Albuquerque | New Mexico | 87102 | - |
| Albuquerque Neuroscience, Inc. | Albuquerque | New Mexico | 87109 | - |
| DENT Neurosciences Research Center | Amherst | New York | 14226 | - |
| 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 | - |
| Upstate Clinical Research Associates | Williamsville | New York | 14221 | - |
| Headache Wellness Center | Greensboro | North Carolina | 27405 | - |
| Neurology Associates, P.A. | Hickory | North Carolina | 28602 | - |
| Lake Shore Clinical Research, LLC | Mooresville | North Carolina | 28117 | - |
| Wake Research Associates LLC | Raleigh | North Carolina | 27612 | - |
| PMG Research of Winston-Salem | Winston-Salem | North Carolina | 27103 | - |
| Plains Clinical Research Center, LLC | Fargo | North Dakota | 58104 | - |
| Radiant Research, Inc. | Akron | Ohio | 44311 | - |
| Neuro-Behavioral Clinical Research, Inc | Canton | Ohio | 44718 | - |
| CTI Clinical research Center | Cincinnati | Ohio | 45227 | - |
| CTI Clinical Research Center | Cincinnati | Ohio | 45212 | - |
| Patient Priority Clinical Sites | Cincinnati | Ohio | 45215 | - |
| Radiant Research, Inc | Cincinnati | Ohio | 45249 | - |
| Sentral Clinical Research Services | Cincinnati | Ohio | 45212 | - |
| University of cincinnati | Cincinnati | Ohio | 45219 | - |
| Ohio Clinical Research, LLC | Cleveland | Ohio | 44124 | - |
| Rapid Medical Research, Inc. | Cleveland | Ohio | 44122 | - |
| Aventiv Research Inc. | Columbus | Ohio | 43213 | - |
| IPS Research Company | Oklahoma City | Oklahoma | 73103 | - |
| Lynn Health Science Institute | Oklahoma City | Oklahoma | 73112 | - |
| NPC Research | Oklahoma City | Oklahoma | 73109 | - |
| Sooner Clinical Research Inc | Oklahoma City | Oklahoma | 73112 | - |
| Oregon Center For Clinical Investigations Inc | Portland | Oregon | 97214 | - |
| Summit Research Network Inc. | Portland | Oregon | 97210 | - |
| Clinical Research Philadelphia | Philadelphia | Pennsylvania | 19114 | - |
| Preferred Primary Care Physicians, Inc. | Pittsburgh | Pennsylvania | 15236 | - |
| Preferred Primary Care Physicians | Uniontown | Pennsylvania | 15401 | - |
| Lincoln Research | Lincoln | Rhode Island | 02865 | - |
| Radiant Research | Anderson | South Carolina | 29621 | - |
| Clinical Trials of South Carolina | Charleston | South Carolina | 29406 | - |
| Vista Clinical Research | Columbia | South Carolina | 29201 | - |
| Hillcrest Clinical Research LLC | Simpsonville | South Carolina | 29681 | - |
| Clinsearch, LLC | Chattanooga | Tennessee | 37421 | - |
| Middle Tennessee Clinical Research | Fayetteville | Tennessee | 37334 | - |
| Holston Medical Group, P.C. | Kingsport | Tennessee | 37660 | - |
| New Orleans Center for Clinical Research | Knoxville | Tennessee | 37920 | - |
| CNS Healthcare | Memphis | Tennessee | 38119 | - |
| Future Search Trials | Austin | Texas | 78731 | - |
| Tekton Research | Austin | Texas | 78745 | - |
| Futuresearch Trials of Dallas, LP | Dallas | Texas | 75231 | - |
| Radiant Research, Inc. | Dallas | Texas | 75234 | - |
| Texas Neurology, P.A. | Dallas | Texas | 75214 | - |
| Research Trials Worldwide, LLC | Humble | Texas | 77338 | - |
| Red Star Research, LLC | Lake Jackson | Texas | 77566 | - |
| Clinical Trials Texas, Inc | San Antonio | Texas | 78229 | - |
| Road Runner Research | San Antonio | Texas | 78258 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic Draper | Draper | Utah | 84020 | - |
| Advanced Research Institute | Ogden | Utah | 84403 | - |
| Granger Medical Clinic - Riverton | Riverton | Utah | 84065 | - |
| Highland Clinical Reserach | Salt Lake City | Utah | 84124 | - |
| Optimum Clinical Research, Inc. | Salt Lake City | Utah | 84102 | - |
| Charlottesville Medical Research Center, LLC | Charlottesville | Virginia | 22911 | - |
| Clinical Research Associates Tidewater | Norfolk | Virginia | 23507 | - |
| Blue Ridge Research Center | Roanoke | Virginia | 24018 | - |
| Sentara Neurology Specialists | Virginia Beach | Virginia | 23456 | - |
| Tidewater Integrated Medical Research | Virginia Beach | Virginia | 23454 | - |
| Northwest Clinical Research Center | Bellevue | Washington | 98007 | - |
| The Polyclinic | Seattle | Washington | 98104 | - |
| South Puget Sound Neurology | Tacoma | Washington | 98409 | - |
| West Virginia University | Morgantown | West Virginia | 26506 | - |