http://www.amrllc.com - Alliance for Multispecialty Research (AMR)
http://www.acr-research.com - Advanced Clinical Research (ACR) - Salt Lake City, Utah and Boise, Idaho
http://www.apexresearch.org - Apex Research Institute (ARI) - Santa Ana, California
http://www.cprkc.com - Center for Pharmaceutical Research (CPR) - Kansas City, Missouri
http://careresearch.com/ - Central Arkansas Research (CARE) - Lexington, Kentucky
http://www.ckrainc.com - Central Kentucky Research Associates (CKRA) - Lexington, Kentucky
http://www.clinphys.com - Clinical Physiology Associates - Fort Myers, Florida 
http://www.crat.org - Clinical Research Associates of Tidewater (CRAT) - Norfolk, Virginia
Clinical Research of South Florida (CRSF) - Coral Gables, Florida
http://www.coastalclinicalresearch.com - Coastal Clinical Research (CCR) - Mobile, Alabama
http://coastalcarolinaresearch.com/ - Coastal Carolina Research Center (CCRC) - Mount Pleasant, South Carolina
Heartland Medical - New Tazwell, Tennessee
http://www.HeartlandResearch.com - Heartland Research Associates (HRA) - Wichita, Kansas
Maine Research Associates - Auburn, Maine
http://www.medisphereresearch.com - MediSphere Medical Research Center - Evansville, Indiana
http://www.clinical-studies.com - National Research Institute (NRI) - Los Angeles, California
http://www.noccr.com - New Orleans Center for Clinical Research (NOCCR) - New Orleans, Louisiana
http://www.omegastudies.com - Omega Medical Research - Warwick, Rhode Island
http://www.researchacrossamerica.com - Research Across America - Reading, Pennsylvania, El Paso and Dallas, Texas
http://www.rcrclinical.com - Rochester Clinical Research (RcR) - Rochester, New York
http://www.tbmr.net/ - Tampa Bay Medical Research, Inc. (TBMR) - Clearwater, Florida
http://www.clinicalresearchsite.com - University Clinical Research, Inc. (UCR) - Pembroke Pines, Florida