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- Abinopharm, Inc
- Academia Cuf Descobertas
- Acibadem Fulya Hastanesi
- Acrobat Trial Group
- Acute Infection and Early Disease Research Program
- Adams Clinical
- Adolescent Trials Network for HIV/AIDS Interventions
- Adult AIDS Clinical Trials Group
- Advancing Clinical Trials in Neonatal Opioid Withdrawal (ACT NOW) Program
- Affordance
- African Malaria Network Trust
- AIDS Clinical Trials Group
- AIDS Malignancy Consortium
- ALL-BFM Study Group
- American Academy of Family Physicians National Research Network
- American College of Radiology Imaging Network
- American-European Congress of Ophthalmic Surgery
- American Research Corporation
- American Thrombosis and Hemostasis Network
- Analyze & Realize
- ANZICS Clinical Trials Group
- AOSpine North America Research Network
- Applied Medical Informatics Research Inc.
- Aptium Oncology Research Network
- ARDEC Academy
- Arizona Oncology Associates
- Asociación Cacereña para la Investigación y el Desarrollo en Oncología Médica
- Asociacion para el Estudio de las Enfermedades Infecciosas
- Association pour la Recherche en Medecine Interne
- Asthma Clinical Research Network
- Atopic Dermatitis and Vaccinia Network
- Austin Institute for Clinical Research
- Australasian Gastro-Intestinal Trials Group
- Australasian Kidney Trials Network
- Australian and New Zealand Intensive Care Society Clinical Trials Group
- Austrian Breast & Colorectal Cancer Study Group
- Austrian Migraine Registry Collaboration
- Austrian South Oncology Group
- Autism Treatment Network
- Aziz Medical Center
- BAR Pharmaceuticals s.r.l.
- BCDiabetes.Ca
- Bioaraba Health Research Institute
- Bionou Research, S.L.
- Blood and Marrow Transplant Clinical Trials Network
- Borstkanker Onderzoek Groep
- Bp Consulting, Inc
- Brazilian Research In Intensive Care Network
- Bulgarian Cardiac Institute
- California Cancer Consortium
- California Joint Replacement Registry
- California Transplant Donor Network
- Canadian Arthritis Network
- Canadian Atherosclerosis Imaging Network
- Canadian Cancer Trials Group
- Canadian Fabry Research Consortium
- Canadian Immunization Research Network
- Canadian Venous Thromboembolism Clinical Trials and Outcomes Research (CanVECTOR) Network
- Cancer and Leukemia Group B
- Cancer Trials Ireland
- CAPRI Clinic
- Cardio Surgical Partners
- Cardiovascular Research Associates
- CAR-T (Shanghai) Cell Biotechnology Co., Ltd.
- Casa di Cura Privata Villa Mafalda
- CBCC Global Research
- Center for Clinical Research and Prevention
- Center for Innovation and Research Organization
- Center for International Blood and Marrow Transplant Research
- Center Trials & Treatment Europe
- Central Texas Primary Care Research Network
- Centre Borelli UMR 9010
- Centre d'Allergologie du Beaujolais
- Centre de la main - CHUV
- Centre for Endocrinology and Reproductive Medicine, Italy
- Centre for the AIDS Programme of Research in South Africa
- Centre Hospitalier de Bethune
- Centre Hospitalier de Valenciennes
- Centre Medico-Chirurgicale et Obstetrique Cote d'Opale
- Centro de Investigación Biomédica en Red de Salud Mental
- Centro de Investigaciones Medicas y Ensayos Clinicos Dr Italo Fabbri
- Centro de Investigacion Sanitaria
- Centro Studi Internazionali, Italy
- CERN Foundation - Collaborative Ependymoma Research Network
- Cervical Artery Dissections and Ischemic Stroke Patients - Consortium
- Cetero Research, San Antonio
- CF Therapeutics Development Network Coordinating Center
- Childhood Asthma Research and Education Network
- Children's Cancer Group, China
- Children's Oncology Group
- Children's Treatment Network
- China Cardiometabolic Registries
- China Spinal Cord Injury Network
- Chinese Medical Association
- Chinese Septic Shock Network
- CHIR-Net
- Chronic Lymphocytic Leukemia Research Consortium
- Chronic Obstructive Pulmonary Disease Clinical Research Network
- CIHR Canadian HIV Trials Network
- Cimera
- CIPRA SA
- Clinica CES
- Clinica Especializada en el Manejo de la Diabetes en la Ciudad de Mexico
- Clinical Associates Research, Maryland
- Clinical City Hospital named after I.V. Davydovsky of Moscow Department of Healthcare
- Clinical Directors Network
- Clinical Investigation Centre for Innovative Technology Network
- Clinical Research Collaborative Network
- Clinical Trials in Organ Transplantation
- Clinical Trials Network of Columbia U, Cornell U, and NY Presbyterian Hospital
- Clinic for Cardiovascular Diseases Magdalena
- Clinique du Quartier Latin
- Clinique Romande de Readaptation
- Collaborative Study Group (CSG)
- Community Programs for Clinical Research on AIDS
- Contact Asia Pacific
- Continuity Research Network
- Convergent Genomics, Inc.
- Cooperative Clinical Trials in Pediatric Transplantation
- Cooperative International Neuromuscular Research Group
- Cooperative Study Group A for Hematology
- CorEvitas
- COVID-19 Prevention Network
- Czech CLL Study Group
- Daacro
- Danish Dementia Research Centre
- Danish Gynecological Cancer Group
- Danish Head and Neck Cancer Group
- Danish Renal Cancer Study Group
- Danish Study Group
- Dental PBRN Japan
- Dental Practice-Based Research Network
- Department of Neurorehabilitation, Hospital of Vipiteno-Sterzing (BZ) Italy
- Dermatology Consulting Services, PLLC
- DGTI - Haemapheresis Vigilance Working Party
- Diabetes and Obesity Research Network
- Divers Alert Network
- Eanm Research Ltd
- Early Detection Research Network
- East African Network for Monitoring Antimalarial Treatment
- East Coast Institute for Research
- Eastern Cooperative Oncology Group
- ECOG-ACRIN Cancer Research Group
- Effect Group, Italy
- Egyptian Biomedical Research Network
- Elder Network
- EmuraCenter LatinoAmerica
- Enrollme.ru, LLC
- EPISTATA
- Equipo Juana Crespo
- Eshmoun Clinical Research Center
- Especialistas en Retina Medica y Quirurgica Grupo de Investigacion
- EULIS Colloborative Research Working Group
- European Breast Cancer Reseach Association of Surgical Trialists
- European Huntington's Disease Network
- European LeukemiaNet
- European Myeloma Network
- European Organisation for Research and Treatment of Cancer - EORTC
- European Society for Blood and Marrow Transplantation
- European Society for Emergency Medicine (EUSEM) Research Network
- European Society of Cardiology
- European Thoracic Oncology Platform
- European Vision Institute Clinical Research Network
- Evolution Research Group
- Express Collaborative
- Eye and Vision Technologies and Research Institute
- Eye Surgeons of Indiana
- Farmagen Ar-Ge Biyot. Ltd. Sti
- Finnish Medical Foundation
- Flanders Medical Research Program
- Flemish Interuniversity Council (VLIR)
- Florida Orthopaedic Institute
- Fondation Ophtalmologique Adolphe de Rothschild
- Foundation for Public Health and Epidemiological Research of Venezuela
- Fraser Orthopaedic Research Society
- French Study Group on Chronic Lymphoid Leukemia
- Fundacion GenesisCare
- Fundacion Oncosur
- Fundacion REVIVA, Red de VIH del Valle del Cauca
- Gaias Research
- Gaias Salud
- Galaxia Empírica
- Galician South Health Research Institute
- Galway Clinic
- GBR Academy
- General Administration of Military Health, Tunisia
- General Practitioners Research Institute
- Geprovas
- German Off Pump Coronary Artery Bypass in Elderly Study Group
- German Research Network on Neuropathic Pain
- German Research Network On Schizophrenia
- Glaser Pediatric Research Network
- GO fit Lab- Ingesport
- GOG Foundation
- Great Lakes Research Into Practice Network
- GREAT Network Italy
- Groupe d'Etude sur le Risque d'Exposition des Soignants aux Agents Infectieux
- Group G-6
- Grupo de Estudos Multicentricos em Onco-Hematologia
- Grupo de Pesquisa em Pleura e Oncologia Toracica