| Synexus Clinical Research US, Inc. | Chandler | Arizona | 85224 | - |
| Alea Research | Phoenix | Arizona | 85012 | - |
| Central Phoenix Medical Clinic | Phoenix | Arizona | 85020 | - |
| Orange Grove Family Practice | Tucson | Arizona | 85741 | - |
| Principals Research Group | Hot Springs | Arkansas | 71901 | - |
| Arkansas Clinical Research | Little Rock | Arkansas | 72205 | - |
| Baptist Health Center for Clinical Research | Little Rock | Arkansas | 72205 | - |
| Med Center Medical Clinic | Carmichael | California | 95608 | - |
| California Headache and Balance Center | Fresno | California | 93720 | - |
| Neuro Pain Medical Center | Fresno | California | 93710 | - |
| Grossmont Center for Clinical Research | La Mesa | California | 91942 | - |
| Paradigm Clinical Research Centers, Inc | La Mesa | California | 91942 | - |
| Torrance Clinical Research Institute, Inc. | Lomita | California | 90731 | - |
| Long Beach Clinical Trials Services | Long Beach | California | 90806 | - |
| Newport Beach Clinical Research Associates | Newport Beach | California | 92663 | - |
| Pharmacology Research Institute | Newport Beach | California | 92660 | - |
| Excell Research, Inc. | Oceanside | California | 92056 | - |
| Rancho Cucamonga Clinical Trials | Rancho Cucamonga | California | 91730 | - |
| Desert Valley Research | Redlands | California | 92374 | - |
| George J. Rederich, M.D. Inc. | Redondo Beach | California | 90277 | - |
| Optimus Medical Group | San Francisco | California | 94102 | - |
| California Neuroscience Research | Sherman Oaks | California | 91403 | - |
| Alpine Clinical Research Center | Boulder | Colorado | 80301 | - |
| Colorado Springs Neurological Associates | Colorado Springs | Colorado | 80907 | - |
| Colorado Neurological Institute | Englewood | Colorado | 80113 | - |
| New England Institute for Clinical Research | Stamford | Connecticut | 06905 | - |
| Aventura Neurological Associates | Aventura | Florida | 33180 | - |
| Neurology Offices of South Florida | Boca Raton | Florida | 33428 | - |
| Sarkis Clinical Trials- Gainesville | Gainesville | Florida | 32607 | - |
| Clinical Neuroscience Solutions, Inc. | Jacksonville | Florida | 32256 | - |
| Westside Center for Clinical Research | Jacksonville | Florida | 32205 | - |
| Well Pharma Medical Research, Corp | Miami | Florida | 33173 | - |
| Clinical Neuroscience Solutions | Orlando | Florida | 32801 | - |
| Neurology Associates of Ormond Beach | Ormond Beach | Florida | 32174 | - |
| Sarasota Memorial Hospital Clinical Research Center | Sarasota | Florida | 34239 | - |
| Meridien Research | St. Petersburg | Florida | 33709 | - |
| Axiom Clinical Research of Florida | Tampa | Florida | 33609 | - |
| University of South Florida | Tampa | Florida | 33612 | - |
| Neurotrials Research | Atlanta | Georgia | 30328 | - |
| Pediatric and Adolescent NeuroDevelopmental Associates (PANDA) Neurology | Atlanta | Georgia | 30328 | - |
| Synexus Clinical Research, Inc | Atlanta | Georgia | 30328 | - |
| Meridian Clinical Research, LLC | Savannah | Georgia | 31406 | - |
| Diamond Headache Clinic Ltd | Chicago | Illinois | 60642 | - |
| JWM Neurology | Indianapolis | Indiana | 46256 | - |
| Deaconess Clinic - Gateway Health Center | Newburgh | Indiana | 47630 | - |
| PMG Research, Inc. d/b/a PMG Research of McFarland Clinic | Ames | Iowa | 50010 | - |
| Heartland Research Associates, LLC | Newton | Kansas | 67114 | - |
| College Park Family Care Center | Overland Park | Kansas | 66212 | - |
| Collective Medical Research | Prairie Village | Kansas | 66208 | - |
| Heartland Research Associates, LLC - An AMR Company | Wichita | Kansas | 67205 | - |
| Heartland Research Associates, LLC - An AMR Company | Wichita | Kansas | 67207 | - |
| DelRicht Research | New Orleans | Louisiana | 70124 | - |
| Pharmasite Research, Inc. | Baltimore | Maryland | 21208 | - |
| John R. Graham Headache Center Brigham and Women's Faulkner Hospital | Boston | Massachusetts | 02103 | - |
| BTC of New Bedford | New Bedford | Massachusetts | 02740 | - |
| Clinical Research Institute | Minneapolis | Minnesota | 55402 | - |
| The Headache Center | Ridgeland | Mississippi | 39157 | - |
| StudyMetrix Research | City of Saint Peters | Missouri | 63303 | - |
| Clinvest Research LLC | Springfield | Missouri | 65810 | - |
| Synexus Clinical Research US, Inc. | Omaha | Nebraska | 68144 | - |
| Bio Behavioral Health | Toms River | New Jersey | 08755 | - |
| Albuquerque Clinical Trials | Albuquerque | New Mexico | 87102 | - |
| Dent Neurosciences Research Center | Amherst | New York | 14226 | - |
| PMG Research of Charlotte, LLC | Charlotte | North Carolina | 28209 | - |
| PMG Research of Raleigh, LLC | Raleigh | North Carolina | 27609 | - |
| Raleigh Neurology Associates, P.A. | Raleigh | North Carolina | 27607 | - |
| PMG Research of Rocky Mount, LLC | Rocky Mount | North Carolina | 27804 | - |
| Wilmington Health, PLLC | Wilmington | North Carolina | 28401 | - |
| Piedmont Medical Research of Winston-Salem | Winston-Salem | North Carolina | 27103 | - |
| Synexus Clinical Research US, Inc. | Akron | Ohio | 44311 | - |
| CTI Clinical Research Center | Cincinnati | Ohio | 45212 | - |
| New Horizons Clinical Research | Cincinnati | Ohio | 45242 | - |
| Patient Priority Clinical Sites | Cincinnati | Ohio | 45215 | - |
| University of Cincinnati | Cincinnati | Ohio | 45219 | - |
| Aventiv Research Inc | Columbus | Ohio | 43212 | - |
| Ohio Clinical Research, LLC | Lyndhurst | Ohio | 44124 | - |
| OK Clinical Research, LLC | Edmond | Oklahoma | 73034 | - |
| Lynn Institute of Norman | Norman | Oklahoma | 72069 | - |
| Tulsa Clinical Research | Tulsa | Oklahoma | 74136 | - |
| Thomas Jefferson University | Philadelphia | Pennsylvania | 19107 | - |
| Preferred Primary Care Physicians | Pittsburgh | Pennsylvania | 15236 | - |
| Frontier Clinical Research, LLC | Smithfield | Pennsylvania | 15478 | - |
| Preferred Primary Care Physicians, Jacob Murphy | Uniontown | Pennsylvania | 15401 | - |
| Abington Neurological Associates | Willow Grove | Pennsylvania | 19090 | - |
| Partners in Clinical Research, LLC | Cumberland | Rhode Island | 02864 | - |
| Ocean State Clinical Research Partners | Lincoln | Rhode Island | 02865 | - |
| Primary Care Associates/Synexus Clinical | Anderson | South Carolina | 29621 | - |
| Clinical Trials of South Carolina | Charleston | South Carolina | 29406 | - |
| Hillcrest Family Practice | Simpsonville | South Carolina | 29681 | - |
| ClinSearch | Chattanooga | Tennessee | 37421 | - |
| Holston Medical Group | Kingsport | Tennessee | 37760 | - |
| Clinical Neuroscience Solutions, Inc. | Memphis | Tennessee | 38119 | - |
| Psychiatry & Psychotherapy Partners Austin | Austin | Texas | 78737 | - |
| Tekton Research | Austin | Texas | 78745 | - |
| Synexus-US | Dallas | Texas | 75234 | - |
| UT Southwestern Medical Center | Dallas | Texas | 75390 | - |
| Ventavia Research Group | Fort Worth | Texas | 76104 | - |
| Centex Studies, Inc. | Houston | Texas | 77058 | - |
| Protenium Clinical Research | Hurst | Texas | 76054 | - |
| Clinical Trials of Texas | San Antonio | Texas | 78229 | - |
| Synexus Clinical Research, Inc | San Antonio | Texas | 78229 | - |
| ClinPoint Trials | Waxahachie | Texas | 75165 | - |
| Highland Clinical Research | Salt Lake City | Utah | 84124 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic South | Salt Lake City | Utah | 84121 | - |
| Synexus-US | Salt Lake City | Utah | 84123 | - |
| J. Lewis Research, Inc. | South Jordan | Utah | 84095 | - |
| Charlottesville Medical Research | Charlottesville | Virginia | 22911 | - |
| Health Research of Hampton Roads | Newport News | Virginia | 23606 | - |
| National Clinical Research, Inc | Richmond | Virginia | 23294 | - |
| Sentara Neruology Specialists | Virginia Beach | Virginia | 23456 | - |
| Northwest Clinical Research Center | Bellevue | Washington | 98004 | - |
| Eastside Therapeutic Resource and Core Clinical Research | Everett | Washington | 98201 | - |
| Puget Sound Neurology | Tacoma | Washington | 98409 | - |