| 1739 | Organización Nacional de Trasplantes |  | 1801 | 1097 | 2538 | 2653 |
| 6790 | Ontar Corporation |  | 7725 | 5743 | 2538 | 3879 |
| 7624 | Ontario Hydro Energy | | 8091 | 6958 | 2538 | 3879 |
| 4459 | Olympic Park Sports Medicine Centre |  | 6123 | 4697 | 2538 | 3316 |
| 5629 | Observatorio de Prospectiva Tecnológica Industrial | | 6556 | 4143 | 2538 | 3879 |
| 6095 | Outcomes Research Institute | | 4719 | 5011 | 2538 | 3879 |
| 4545 | Ontario Research Center for Computer Algebra |  | 5048 | 2688 | 2538 | 3879 |
| 4351 | Oregon Clinic | | 4304 | 2446 | 2538 | 3879 |
| 7376 | Orenburg Scientific Center UB RAS / Оренбургский научный центр Уральского отделения РАН |  | 7470 | 6811 | 2538 | 3879 |
| 6604 | Institute of Steppe UB RAS / Институт степи Уральского отделения РАН | | 4365 | 5771 | 2538 | 3879 |
| 6930 | Orentreich Foundation for Advancement of Science | | 6922 | 6151 | 2538 | 3879 |
| 4332 | National Institute of Rheumatology and Physiotherapy Budapest |  | 5704 | 5494 | 2538 | 3034 |
| 2614 | UMR8167 Orient et Méditerranée Textes Archéologie Histoire |  | 2629 | 2934 | 2538 | 2733 |
| 7437 | Oriental Institute ASCR |  | 3092 | 7185 | 2538 | 3879 |
| 7268 | Institute of Oriental Studies National Academy of Sciences of Armenia |  | 4805 | 6861 | 2538 | 3879 |
| 3873 | Institute of Oriental Manuscripts RAS / Институт восточных рукописей РАН | | 849 | 1971 | 2538 | 3879 |
| 922 | Oak Ridge Institute for Science and Education | | 4113 | 899 | 2538 | 834 |
| 4739 | VA Medical Center Orlando | | 6355 | 5869 | 2538 | 3076 |
| 3750 | Fundación José Ortega y Gasset | | 3473 | 1586 | 2538 | 3879 |
| 4510 | Klinikum Lahr-Ettenheim |  | 2506 | 2839 | 2538 | 3879 |
| 7381 | Rheinische Klinik für Orthopädie Viersen | | 5434 | 6994 | 2538 | 3879 |
| 6837 | Swedish Herbal Institute / Svenska Örtmedicinska Institutet |  | 7607 | 5863 | 2538 | 3879 |
| 7338 | Klinika za Ortopediju Lovran |  | 6785 | 6840 | 2538 | 3879 |
| 4297 | Centro Agronómico Tropical de Investigación y Enseñanza SIDALC |  | 1034 | 2627 | 2538 | 3879 |
| 7122 | Orthopaedic Research of Virginia | | 5884 | 6526 | 2538 | 3879 |
| 1532 | Osaka National Hospital |  | 3631 | 2190 | 2538 | 1351 |
| 4596 | Osaka Rosai Hospital | | 4338 | 7314 | 2538 | 2077 |
| 3295 | Ohio Supercomputer Center | | 2823 | 1052 | 2538 | 3879 |
| 7188 | Observatorio San Calixto |  | 6092 | 6636 | 2538 | 3879 |
| 4319 | Osiris Therapeutics | | 3743 | 2436 | 2538 | 3879 |
| 8048 | Réseau Osiris Université de Strasbourg | | 7954 | 7971 | 2538 | 3879 |
| 476 | Oslo Universitetssykehus |  | 1633 | 1168 | 2538 | 76 |
| 6771 | Onkologischer Schwerpunkt Stuttgart | | 7086 | 5838 | 2538 | 3879 |
| 4195 | Ospedale di Circolo Fondazione Macchi |  | 4870 | 6471 | 2538 | 2377 |
| 4871 | Azienda Ospedaliera di Rilievo Nazionale Antonio Cardarelli | | 2092 | 3402 | 2538 | 3879 |
| 5815 | National Research Institute for Radiobiology and Radiohygiene | | 4947 | 4571 | 2538 | 3879 |
| 7303 | Ludwig Boltzmann Institute for Osteology / Ludwig Boltzmann Institut für Osteologie |  | 7424 | 6704 | 2538 | 3879 |
| 5527 | Oestfold Research Foundation | | 4309 | 4196 | 2538 | 3879 |
| 5504 | Eastern Norway Research Institute | | 2418 | 4315 | 2538 | 3879 |
| 6517 | Institut für Ostrecht Munchen | | 6625 | 5471 | 2538 | 3879 |
| 7456 | UMS3563 Enveloppes Fluides de La Ville À L'Exobiologie Efluve | | 6906 | 7037 | 2538 | 3879 |
| 2725 | UMS832 Observatoire des Sciences de la Terre de l'Univers et de l'Environnement de Grenoble | | 1144 | 1294 | 2538 | 3509 |
| 5776 | Oklahoma State University Medical Center | | 6695 | 4355 | 2538 | 3879 |
| 7142 | UMS3281 Observatoire des Sciences de L'Univers Nantes Atlantique Osuna | | 5849 | 6570 | 2538 | 3879 |
| 5276 | UMS3343 Observatoire des Sciences de L'Univers de Rennes OSUR | | 1995 | 3998 | 2538 | 3879 |
| 7190 | UMS3365 Osu Réunion Osu Reunion | | 7057 | 6564 | 2538 | 3879 |
| 7551 | UMS3562 Observatoire Terre et Environnement de Lorraine Otelo | | 7303 | 7150 | 2538 | 3879 |
| 5059 | Otorhinolaryngology Clinical Research Center / Научно клинический центр оториноларингологии ФМБА | | 2775 | 3608 | 2538 | 3879 |
| 3373 | Institute of Obstetrics and Gynecology D O Ott / Научно исследовательский институт акушерства и гинекологии и репродуктологии им Д О Отта | | 4805 | 3620 | 2538 | 3076 |
| 6553 | Otto- Fricke- Krankenhaus | | 6508 | 5565 | 2538 | 3879 |
| 741 | Odense University Hospital |  | 1301 | 1654 | 2538 | 166 |
| 1072 | University of Oklahoma Medical Center | | 1581 | 1011 | 2538 | 1153 |
| 4116 | Oslo University Hospital Research | | 1004 | 2335 | 2538 | 3879 |
| 6594 | Istituto Opera del Vocabolario Italiano | | 1553 | 6694 | 2538 | 3660 |
| 5503 | Ost-West Wissenschaftszentrum | | 5040 | 4111 | 2538 | 3879 |
| 4275 | Oxford Centre for Islamic Studies |  | 4468 | 2317 | 2538 | 3879 |
| 3711 | Oxford Health | | 2068 | 1611 | 2538 | 3879 |
| 5610 | Polar Alpine Botanical Garden Institute N A Aurorin KSC RAS / Полярно альпийский ботанический сад институт им Н А Аврорина Кольского научного центра РАН | | 5062 | 4243 | 2538 | 3879 |
| 5149 | UMR6574 Centre de Recherche et de Documentation sur l'Océanie | | 5243 | 4563 | 2538 | 3660 |
| 5403 | Pacific Rim Conservation | | 6414 | 5377 | 2538 | 3509 |
| 3431 | Pacific Whale Foundation | | 4671 | 1152 | 2538 | 3879 |
| 2614 | Pacific Institute for Studies in Development Environment and Security | | 2749 | 458 | 2538 | 3879 |
| 3002 | David and Lucile Packard Foundation | | 2535 | 773 | 2538 | 3879 |
| 6227 | University of Washington College of Forest Resources | | 7396 | 4910 | 2538 | 3879 |
| 4351 | UMR5194 Politiques Publiques, Action Politique, Territoires | | 1633 | 2645 | 2538 | 3879 |
| 3248 | Philippine Atmospheric, Geophysical and Astronomical Services Administration |  | 1484 | 2085 | 2538 | 3509 |
| 3186 | Palais de la Découverte | | 4787 | 864 | 2538 | 3879 |
| 2767 | UMR7207 Centre de Recherche Sur La Paléobiodiversité et les Paléoenvironnements Cr2P | | 5986 | 5074 | 2538 | 1681 |
| 5031 | Roman Kozłowski Institute of Paleobiology Polish Academy of Sciences / Roman Kozłowski Instytut Paleobiologii Polskiej Akademii Nauk |  | 3063 | 7001 | 2538 | 2733 |
| 2906 | Institute for Palestine Studies |  | 262 | 839 | 2538 | 3879 |
| 7636 | UMR7262 Laboratoire Paléontologie Evolution Paléoécosystèmes Paléoprimatologie Palevoprim | | 6499 | 7372 | 2538 | 3879 |
| 1624 | VA Palo Alto Health Care System | | 5373 | 5290 | 2538 | 233 |
| 1491 | Palo Alto Medical Foundation | | 4135 | 446 | 2538 | 2867 |
| 7015 | Lublin Branch Polish Academy of Sciences / Polska Akademia Nauk Lublin | | 3087 | 6536 | 2538 | 3879 |
| 5272 | Poznan Branch Polish Academy of Sciences / Polska Akademia Nauk Oddział w Poznaniu | | 4983 | 3730 | 2538 | 3879 |
| 4042 | Pankey Institute | | 4658 | 1933 | 2538 | 3879 |
| 6568 | Paolo Memorial Hospital |  | 7707 | 5392 | 2538 | 3879 |
| 6403 | Paracelsus Klinik Lustmuhle |  | 6272 | 5347 | 2538 | 3879 |
| 6318 | Polish Academy of Sciences Scientific Center in Paris / Polska Akademia Nauk Stacja Naukowa w Paryżu | | 5497 | 5278 | 2538 | 3879 |
| 6665 | UMR7216 Epigénétique et Destin Cellulaire | | 5817 | 5804 | 2538 | 3879 |
| 6991 | Park-Klinik Kiel | | 7028 | 6234 | 2538 | 3879 |
| 6645 | Parkinson-Klinik Wolfach | | 7222 | 5620 | 2538 | 3879 |
| 5598 | Parkinson's Institute | | 7634 | 3849 | 2538 | 3879 |
| 7175 | UMR2017 Passages Bordeaux-Pau | | 5336 | 7535 | 2538 | 3509 |
| 3369 | Palestinian Academic Society for the Study of International Affairs | | 2495 | 1159 | 2538 | 3879 |
| 4490 | Centre Pasteur du Cameroun |  | 4532 | 5533 | 2538 | 3140 |
| 4529 | Institut Pasteur du Maroc |  | 4847 | 4933 | 2538 | 3316 |
| 3156 | Institut Pasteur de Dakar |  | 6756 | 4200 | 2538 | 2510 |
| 6038 | Saint Petersburg Pasteur Institute of Epidemiology and Microbiology / Санкт Петербургский научно исследовательский институт эпидемиологии и микробиологии им Пастера Роспотребнадзора | | 4122 | 4976 | 2538 | 3879 |
| 5616 | Fundación Patagonia Natural |  | 4501 | 4304 | 2538 | 3879 |
| 8002 | Centro Científico Tecnológico CONICET Patagonia Norte | | 6623 | 7981 | 2538 | 3879 |
| 6825 | Trinity Regional Hospital Fort Dodge | | 7475 | 5883 | 2538 | 3879 |
| 7148 | Pathologie Institut Enge | | 6656 | 6513 | 2538 | 3879 |
| 7534 | Institute of Molecular Pathology and Pathologic Morphology RAMS / Научно исследовательский институт региональной патологии и патоморфологии Сибирского отделения Российской академии медицинских наук | | 5271 | 7236 | 2538 | 3879 |
| 6382 | PathWest Laboratory Medicine WA | | 4586 | 5446 | 2538 | 3879 |
| 7076 | Institute of Cultural Heritage of the Academy of Sciences of Moldova |  | 4565 | 6534 | 2538 | 3879 |
| 6558 | UMS2006 Patrimoine Naturel PATRINAT | | 6132 | 5612 | 2538 | 3879 |
| 7541 | Centre for Patristic Research |  | 7904 | 6950 | 2538 | 3879 |
| 6350 | Das Paulinenkrankenhaus | | 6475 | 5245 | 2538 | 3879 |
| 7715 | UMR6270 Polymeres Biopolymeres Surfaces | | 6613 | 7490 | 2538 | 3879 |
