O. M. Neotech, Inc.   1 study
Oakwood Laboratories, LLC   2 studies
OBEcure Ltd.   4 studies
Objectif Recherche Vaccins SIDA   2 studies
Obsessive Compulsive Foundation   3 studies
Obstetrix Medical Group   7 studies
OccuLogix   3 studies
Ocean Nutrition   3 studies
Ocean Spray, Inc.   3 studies
Oceanova Biotechnologies Inc.   1 study
Ocera Therapeutics   6 studies
Ochsner Health System   5 studies
Oclassen Pharmaceuticals   2 studies
Octagen Corporation   1 study
Octapharma   6 studies
Ocular Transplantation   2 studies
Oculus Innovative Sciences, Inc.   1 study
OcuSense, Inc   1 study
Odense University Hospital   87 studies
ODF Medical   1 study
Office of Dietary Supplements (ODS)   35 studies
Office of Rare Diseases (ORD)   36 studies
Office of Research on Women's Health (ORWH)   15 studies
Ohio State University   101 studies
Ohio State University Comprehensive Cancer Center   34 studies
Ohio University   2 studies
Ohm Laboratories, Inc.   1 study
Oita Red Cross Hospital   1 study
Oita University   2 studies
Oizumi Hospital   1 study
Okayama University   2 studies
Oklahoma Medical Research Foundation   1 study
Oklahoma State University Center for Health Sciences   17 studies
Okuvision GmbH   1 study
Olmsted Medical Center   1 study
Olympic Medical   3 studies
Omega Pharma   1 study
Omeros Corporation   6 studies
Omneuron   1 study
Omnicare Clinical Research   1 study
Omninvest Vaccine Manufacturing, Researching and Trading Ltd.   1 study
OmniSonics Medical Technologies, Inc.   1 study
OMRIX Biopharmaceuticals   6 studies
Onassis Cardiac Surgery Centre   2 studies
OncoGenex Pharmaceuticals   7 studies
OncoGenex Technologies   3 studies
Oncology Institute of Southern Switzerland   1 study
Oncology Specialists, S.C.   8 studies
Oncology Specialties, Alabama   3 studies
Oncolytics Biotech   3 studies
OncoMed Pharmaceuticals, Inc.   1 study
Oncoscience AG   4 studies
Oncotech   1 study
Oncotherapeutics   5 studies
Oncothyreon Canada Inc.   2 studies
Oncothyreon Inc.   4 studies
Oncovir, Inc.   2 studies
OncoVista, Inc.   1 study
Oncozyme Pharma Inc.   2 studies
Ondine Research Laboratories   4 studies
Oneness Biotech Co., Ltd.   1 study
Ono Academic College   2 studies
Ono Pharma   30 studies
Ontario Association of Optometrists   1 study
Ontario Cancer Research Network   9 studies
Ontario Centres of Excellence   1 study
Ontario Clinical Oncology Group (OCOG)   30 studies
Ontario Ginseng Growers Association   2 studies
Ontario HIV Treatment Network   8 studies
Ontario Hospital Association   1 study
Ontario Lung Association   4 studies
Ontario Mental Health Foundation   10 studies
Ontario Ministry of Agriculture, Food and Rural Affairs   3 studies
Ontario Ministry of Health and Long Term Care   36 studies
Ontario Neurotrauma Foundation   9 studies
ONY   2 studies
ONYX Pharmaceuticals   11 studies
Onze Lieve Vrouwe Gasthuis   3 studies
Opexa Therapeutics, Inc.   3 studies
Ophtec USA   3 studies
Ophthalmic Consultants of Boston   3 studies
Ophthalmic Consultants of Long Island   3 studies
Ophthalmic PDT Study Group   1 study
Ophthalmic Research Associates   3 studies
Ophthalmological Association Edelweiss   2 studies
Ophthalmology department, University of California,Irvine   1 study
Ophthotech Corporation   3 studies
Opko Health, Inc.   5 studies
Optimer Pharmaceuticals   5 studies
Optiscan Pty Ltd   1 study
Optivasive Ltd.   1 study
Opto Eletronica S.A.   1 study
Ora Bio Ltd.   1 study
OraPharma   2 studies
Orasi Medical, Inc.   1 study
OrbusNeich   2 studies
Oregon Clinical and Translational Research Institute   6 studies
Oregon Health and Science University   138 studies
Oregon Research Institute   12 studies
Oregon Social Learning Center   2 studies
Oregon State University   5 studies
Orexigen Therapeutics, Inc   12 studies
Orexo AB   1 study
Orfagen   2 studies
Organ Transplant Institute, China   1 study
Organisation for Oncology and Translational Research   2 studies
Organization for Autism Research   1 study
Organization to Achieve Solutions in Substance Abuse (OASIS)   5 studies
Organogenesis   6 studies
Organon   129 studies
Ori Diagnostic Instruments LLC   1 study
Oridion   2 studies
ORION Clinical Services   3 studies
Orion Corporation, Orion Pharma   25 studies
Orlando Health, Inc.   1 study
Orlando Immunology Center   2 studies
Orlando Regional Medical Center   1 study
OroScience, Inc.   1 study
Orphan Australia   1 study
Orphan Medical   7 studies
Orphan Therapeutics   1 study
Orphanetics Pharma Entwicklungs GmbH   1 study
Orqis Medical Corporation   1 study
Ortec International   2 studies
Ortho Biotech Clinical Affairs, L.L.C.   14 studies
Ortho Biotech Products, L.P.   39 studies
Ortho Biotech, Inc.   24 studies
Ortho Dermatologics   1 study
Ortho Pharmaceuticals   6 studies
Ortho-McNeil Janssen Scientific Affairs, LLC   17 studies
Ortho-McNeil Neurologics, Inc.   39 studies
Ortho-McNeil Pharmaceutical   9 studies
Ortho-McNeil, Inc.   6 studies
OrthoAccel Technologies Inc.   1 study
Orthofix, Inc.   2 studies
OrthoMediTec   1 study
Orthopaedic Research Foundation   2 studies
Orthopedic Hospital Vienna Speising   1 study
Orthovita   2 studies
Osaka Acute Coronary Insufficiency Study Group   1 study
Osaka City University   4 studies
Osaka General Medical Center   4 studies
Osaka Saiseikai Nakatsu Hospital   1 study
Osaka University   8 studies
OSCAR Study   1 study
Osel, Inc.   3 studies
OSF Saint Francis Medical Center   3 studies
OSI Pharmaceuticals   48 studies
Osiris Therapeutics   15 studies
Oslo University College   2 studies
Osmotica Pharmaceutical Corporation   1 study
Ospedale L. Sacco – Polo Universitario   1 study
Ospedale Microcitemico   1 study
Ospedale Misericordia e Dolce   3 studies
Ospedale Regionale Bellinzona e Valli   2 studies
Ospedale Regionale di Locarno   2 studies
Ospedale S. Giovanni Bosco   4 studies
Ospedale Sacro Cuore - Don Calabria   1 study
Ospedale San Donato   1 study
Ospedale Santa Croce-Carle Cuneo   1 study
Ospedale Santa Maria di Loreto Mare   1 study
Ospedali Riuniti di Bergamo   8 studies
Ospedali Riuniti Trieste   1 study
Ossacur Inc.   1 study
Osteogenesis Imperfecta Foundation   1 study
Osteologix   1 study
Osteopathic Heritage Foundations   4 studies
Osteotech, Inc   1 study
Ostfold Hospital Trust   2 studies
Oswaldo Cruz Foundation   12 studies
Othera Pharmaceuticals   3 studies
Otolaryngology Medical Clinic,University of California, Irvine   2 studies
Otsuka America Pharmaceutical   40 studies
Otsuka Beijing Research Institute   6 studies
Otsuka Frankfurt Research Institute GmbH   5 studies
Otsuka Pharmaceutical Co., Ltd.   44 studies
Otsuka Pharmaceutical Development & Commercialization, Inc.   24 studies
Otsuka Pharmaceutical, Inc., Philippines   2 studies
Ottawa Fertility Centre   1 study
Ottawa Health Research Institute   83 studies
Ottawa Regional Cancer Centre   1 study
Oulu University Hospital   7 studies
Ounce of Prevention Fund   2 studies
Our Lady of Mercy Medical Center   1 study
Outcomes Research Consortium   34 studies
Ovalum   3 studies
Ovation Pharmaceuticals   7 studies
Ovation Research Group   1 study
Oxagen Ltd   2 studies
Oxford BioMedica   8 studies
Oxford Brookes University   1 study
Oxford Radcliffe Hospitals NHS Trust   2 studies
OXiGENE   4 studies
OXO Chemie   1 study
Oxo Chemie GmbH   2 studies
OxThera   1 study
OxyPharma   1 study
Oy Foodfiles Ltd   1 study
Oystershell NV   1 study