Cancer Organizations: C
- C. Gordon Griffith Comprehensive Cancer Center at North Shore Medical Center
- C. H. De Saumur
- C. H. Du Mans
- C. Klien and Associates
- C.H. Bastien de Clocheville
- C.H. Bourg En Bresse
- C.H. Du Havre
- C.H. General De Montbelliard
- C.H. Senlis
- C.H.G Laval
- C.H.G. Beauvais
- C.H.G. De Pau
- C.H.G. Du Havre - Hopital J. Monod
- C.H.G. Louis Pasteur
- C.H.U. - Hopital Gaston Doumergue
- C.H.U. de Brest
- C.H.U. de Nimes - Groupe Hospitals-Universitaire Caremeau
- C.R I O.
- C.S. Mott Children's Hospital at University of Michigan Medical Center
- CABYC, SL
- CALGB Statistical Office at Duke University Medical Center
- CBS - New Jersey Cord Blood Bank
- CCOP - Atlanta Regional
- CCOP - Bay Area Tumor Institute
- CCOP - Beaumont
- CCOP - Cancer Research for the Ozarks
- CCOP - Carle Cancer Center
- CCOP - Cedar Rapids Oncology Project
- CCOP - Central Illinois
- CCOP - Christiana Care Health Services
- CCOP - Colorado Cancer Research Program
- CCOP - Columbia River Oncology Program
- CCOP - Columbus
- CCOP - Dayton
- CCOP - Duluth
- CCOP - Evanston
- CCOP - Florida Pediatric
- CCOP - Geisinger Clinic and Medical Center
- CCOP - Grand Rapids
- CCOP - Greenville
- CCOP - Heartland Research Consortium
- CCOP - Hematology-Oncology Associates of Central New York
- CCOP - Illinois Oncology Research Association
- CCOP - Iowa Oncology Research Association
- CCOP - Kalamazoo
- CCOP - Kansas City
- CCOP - Main Line Health
- CCOP - Marshfield Clinic Research Foundation
- CCOP - Mayo Clinic Scottsdale Oncology Program
- CCOP - MeritCare Hospital
- CCOP - Metro-Minnesota
- CCOP - Michigan Cancer Research Consortium
- CCOP - Missouri Valley Cancer Consortium
- CCOP - Montana Cancer Consortium
- CCOP - Mount Sinai Medical Center
- CCOP - Nevada Cancer Research Foundation
- CCOP - North Shore University Hospital
- CCOP - Northern Indiana CR Consortium
- CCOP - Northern New Jersey
- CCOP - Northwest
- CCOP - Ochsner
- CCOP - Oklahoma
- CCOP - Santa Rosa Memorial Hospital
- CCOP - Scott and White Hospital
- CCOP - Sioux Community Cancer Consortium
- CCOP - Southeast Cancer Control Consortium
- CCOP - St. Louis-Cape Girardeau
- CCOP - St. Vincent Hospital Cancer Center, Green Bay
- CCOP - Toledo Community Hospital
- CCOP - Upstate Carolina
- CCOP - Virginia Mason Research Center
- CCOP - Western Regional, Arizona
- CCOP - Wichita
- CCS Oncology Center - Kenmore
- CCS Oncology Center - Lockport
- CDN Surgical Associates, Limited
- CEL-SCI Corporation
- CEPTYR, Incorporated - Redmond
- CETEN
- CGH Medical Center
- CH Meulan
- CHG Roanne
- CHP Regional Medical Center
- CHR - Clinique Saint Joseph - Hopital de Warqueguies
- CHR - Clinique Saint Joseph - Hopital de Warqueguies - Boussu
- CHR Clermont Ferrand, Hotel Dieu
- CHR D'Orleans - Hopital de la Source
- CHR Hotel Dieu
- CHR de Besancon - Hopital Saint-Jacques
- CHRISTUS Santa Rosa Cancer Center at CHRISTUS Santa Rosa Hospital - City Centre
- CHRISTUS Santa Rosa Children’s Hospital
- CHRISTUS Spohn Cancer Center
- CHRISTUS Spohn Hospital Corpus Christi - Memorial
- CHRISTUS Spohn Hospital Corpus Christi - Shoreline
- CHRISTUS St. Michael Hospital
- CHRU de Tours - Hopital Trousseau
- CHU - Saint-Pierre
- CHU - Hopital Robert Debre
- CHU - Robert Debre
- CHU Amiens - Hopital Sud