| 2764 | Organization for Tropical Studies |  | 2870 | 1930 | 2538 | 3252 |
| 6149 | Orient Institute |  | 6872 | 4884 | 2538 | 3879 |
| 7437 | Oriental Institute ASCR |  | 3092 | 7185 | 2538 | 3879 |
| 7235 | Orlando Clinical Research Center |  | 7368 | 6589 | 2538 | 3879 |
| 6686 | Orthopädische Klinik Volmarstein | | 6360 | 5801 | 2538 | 3879 |
| 7122 | Orthopaedic Research of Virginia | | 5884 | 6526 | 2538 | 3879 |
| 3553 | Orthopedic Institute Gaetano Pini |  | 2710 | 4895 | 2521 | 2867 |
| 3503 | Osaka Municipal Technical Research Institute |  | 4680 | 4741 | 2538 | 2733 |
| 1532 | Osaka National Hospital | | 3631 | 2190 | 2538 | 1351 |
| 4864 | Osaka Prefectural Institute of Public Health | | 3259 | 6990 | 2538 | 2627 |
| 4596 | Osaka Rosai Hospital | | 4338 | 7314 | 2538 | 2077 |
| 7242 | Oscar G. Johnson VA Medical Center | | 6295 | 7315 | 2538 | 3660 |
| 2524 | OSF Saint Francis Medical Center | | 894 | 954 | 2258 | 3879 |
| 4319 | Osiris Therapeutics | | 3743 | 2436 | 2538 | 3879 |
| 7781 | Oslo Heart Center |  | 8011 | 7337 | 2538 | 3879 |
| 476 | Oslo Universitetssykehus | | 1633 | 1168 | 2538 | 76 |
| 4116 | Oslo University Hospital Research | | 1004 | 2335 | 2538 | 3879 |
| 4195 | Ospedale di Circolo Fondazione Macchi | | 4870 | 6471 | 2538 | 2377 |
| 8130 | Ospedale Giovanni Fornaroli | | 8091 | 8125 | 2538 | 3879 |
| 6255 | Ospedale Gradenigo | | 4961 | 5240 | 2538 | 3879 |
| 405 | Ospedale Maggiore Policlinico Milano | | 1330 | 1924 | 506 | 176 |
| 494 | Ospedale Niguarda | | 786 | 1770 | 333 | 458 |
| 613 | Ospedale Pediatrico Gaslini | | 3303 | 2372 | 209 | 519 |
| 206 | Ospedale San Raffaele (Istituto Scientifico Universitario) | | 2280 | 1166 | 37 | 116 |
| 4346 | Osservatorio Astrofisico di Arcetri | | 2178 | 5256 | 869 | 3879 |
| 7536 | Osservatorio Astrofisico di Catania | | 4688 | 7266 | 2538 | 3879 |
| 6350 | Osservatorio Astronomico di Bologna | | 2636 | 5535 | 2538 | 3879 |
| 2594 | Osservatorio Astronomico di Capodimonte | | 4011 | 7225 | 1922 | 1001 |
| 4542 | Osservatorio Astronomico di Torino | | 5160 | 6668 | 2538 | 2510 |
| 7295 | Osservatorio Astronomico di Trieste | | 2084 | 7042 | 2538 | 3879 |
| 2556 | Osservatorio Astronomico Roma | | 4692 | 6688 | 2538 | 543 |
| 5503 | Ost-West Wissenschaftszentrum | | 5040 | 4111 | 2538 | 3879 |
| 61 | Osterreichische Akademie der Wissenschaften |  | 35 | 181 | 120 | 125 |
| 4404 | Osterreichische Forschungsstiftung für Entwicklungshilfe | | 3175 | 2591 | 2538 | 3879 |
| 5372 | Osterreichische Institut für Internationale Politik | | 2406 | 4144 | 2538 | 3879 |
| 5094 | Österreichisches Institut für Menschenrechte | | 3319 | 3634 | 2538 | 3879 |
| 976 | Osterreichisches Institut für Wirtschaftsforschung | | 1055 | 1123 | 1250 | 2124 |
| 5357 | Ostschweizer Kinderspital |  | 5892 | 3803 | 2538 | 3879 |
| 5059 | Otorhinolaryngology Clinical Research Center / Научно клинический центр оториноларингологии ФМБА |  | 2775 | 3608 | 2538 | 3879 |
| 345 | Ottawa Civic Hospital |  | 2352 | 1220 | 1376 | 144 |
| 218 | Ottawa Health Research Institute | | 1946 | 796 | 108 | 208 |
| 6553 | Otto- Fricke- Krankenhaus | | 6508 | 5565 | 2538 | 3879 |
| 1702 | Our Lady's Children's Hospital |  | 5040 | 3338 | 2538 | 990 |
| 6095 | Outcomes Research Institute | | 4719 | 5011 | 2538 | 3879 |
| 776 | Overseas Development Institute |  | 721 | 222 | 1057 | 2919 |
| 6523 | Overton Brooks VA Medical Center Shreveport LA | | 7064 | 7126 | 2538 | 3316 |
| 5491 | Oxford Centre for Hebrew and Jewish Studies | | 4996 | 4097 | 2538 | 3879 |
| 4275 | Oxford Centre for Islamic Studies | | 4468 | 2317 | 2538 | 3879 |
| 3711 | Oxford Health | | 2068 | 1611 | 2538 | 3879 |
| 2471 | Oxford Institute for Energy Studies | | 2642 | 860 | 2203 | 3879 |
| 181 | Oxford University Hospitals NHS Trust | | 1703 | 822 | 568 | 82 |
| 211 | P N Lebedev Physics Institute RAS | | 465 | 684 | 695 | 159 |
| 864 | P P Shirshov Institute of Oceanology RAS | | 2203 | 1424 | 925 | 1596 |
| 6840 | Pacific Health Research and Education Institute Hawaii | | 7684 | 6601 | 2538 | 3660 |
| 1375 | Pacific Institute for Research and Evaluation | | 4431 | 2147 | 1798 | 2002 |
| 2614 | Pacific Institute for Studies in Development Environment and Security | | 2749 | 458 | 2538 | 3879 |
| 4704 | Pacific Institute for the Mathematical Sciences | | 1751 | 3198 | 2538 | 3879 |
| 3686 | Pacific Institute of Bioorganic Chemistry G B Elyakov FEB RAS / Тихоокеанский институт биоорганической химии им Г Б Елякова Дальневосточного отделения РАН | | 4409 | 5787 | 2538 | 2377 |
| 8067 | Pacific Institute of Bioorganic Chemistry RAS | | 7655 | 8053 | 2538 | 3879 |
| 6202 | Pacific Institute of Geography RAS | | 6788 | 4981 | 2538 | 3879 |
| 6572 | Pacific International Center for High Technology Research | | 6430 | 5601 | 2538 | 3879 |
| 4971 | Pacific Northwest Diabetes Research Institute | | 7012 | 4003 | 2445 | 3879 |
| 1177 | Pacific Northwest National Laboratory | | 441 | 211 | 27 | 3879 |
| 2786 | Pacific Oceanology Institute RAS | | 3914 | 5482 | 2126 | 2377 |
| 5350 | Pacific Research Fisheries Center / Тихоокеанский научно исследовательский рыбохозяйственный центр | | 2861 | 4078 | 2538 | 3879 |
| 5403 | Pacific Rim Conservation | | 6414 | 5377 | 2538 | 3509 |
| 3431 | Pacific Whale Foundation | | 4671 | 1152 | 2538 | 3879 |
| 2066 | Pakistan Agricultural Research Council |  | 1989 | 2540 | 2238 | 2867 |
| 3101 | Pakistan Council of Scientific and Industrial Research | | 6389 | 5160 | 2538 | 2002 |
| 6730 | Pakistan Health Research Council | | 7567 | 7129 | 2538 | 3410 |
| 5298 | Pakistan Science Foundation | | 5364 | 3740 | 2538 | 3879 |
| 4442 | Pakistan Space and Upper Atmosphere Research Commission | | 3660 | 2632 | 2538 | 3879 |
| 1320 | Palaeontological Institute RAS | | 3140 | 1340 | 1802 | 2460 |
| 3186 | Palais de la Découverte |  | 4787 | 864 | 2538 | 3879 |
| 3369 | Palestinian Academic Society for the Study of International Affairs |  | 2495 | 1159 | 2538 | 3879 |
| 3434 | Palestinian Center for Policy and Survey Research | | 4893 | 1141 | 2538 | 3879 |
| 3218 | Palladin Institute of Biochemistry National Academy of Sciences of Ukraine |  | 2608 | 4799 | 2538 | 2460 |
| 1491 | Palo Alto Medical Foundation | | 4135 | 446 | 2538 | 2867 |
| 426 | Palo Alto Research Center | | 2710 | 363 | 317 | 1473 |
| 4042 | Pankey Institute | | 4658 | 1933 | 2538 | 3879 |
| 6568 | Paolo Memorial Hospital |  | 7707 | 5392 | 2538 | 3879 |
| 3292 | Papanin Institute for Biology of Inland Waters RAS | | 3071 | 4101 | 2538 | 2867 |
| 6412 | Paparella Ear Head and Neck Institute | | 6788 | 5304 | 2538 | 3879 |
| 4468 | Paper and Fibre Research Institute | | 7954 | 5849 | 2538 | 2653 |
| 4900 | Papiertechnische Stiftung | | 4431 | 3285 | 2538 | 3879 |
| 2712 | Papua New Guinea Institute Medical Research |  | 6380 | 4238 | 2538 | 2053 |
| 6403 | Paracelsus Klinik Lustmuhle | | 6272 | 5347 | 2538 | 3879 |
| 784 | Parc de Salut Mar (Institut Municipal d'Assistencia Sanitaria) |  | 663 | 1832 | 954 | 1015 |
| 6991 | Park-Klinik Kiel | | 7028 | 6234 | 2538 | 3879 |
| 5598 | Parkinson's Institute | | 7634 | 3849 | 2538 | 3879 |
| 6645 | Parkinson-Klinik Wolfach | | 7222 | 5620 | 2538 | 3879 |
| 5620 | Partners HealthCare Personalized Medicine Genetics and Genomics | | 6722 | 4099 | 2538 | 3879 |
| 754 | Pasteur Institute of Iran |  | 1412 | 2062 | 426 | 958 |
| 6095 | Patent Facilitating Centre |  | 6442 | 4849 | 2538 | 3879 |
| 7148 | Pathologie Institut Enge | | 6656 | 6513 | 2538 | 3879 |
| 6382 | PathWest Laboratory Medicine WA |  | 4586 | 5446 | 2538 | 3879 |
| 2738 | Paton Electric Welding Institute National Academy of Sciences of Ukraine | | 7406 | 3529 | 1787 | 3191 |
| 5497 | Patuxent Wildlife Research Center | | 3468 | 4214 | 2538 | 3879 |
| 1234 | Paul Drude Institut für Festkörperelektronik | | 2464 | 3478 | 720 | 1366 |
| 971 | Paul Ehrlich Institut | | 1275 | 736 | 2538 | 1256 |
