| Clinical Medicine · 233 listed authors (22.0%) |
| Pharmacology & Pharmacy | 55 | 5.2% | 9 | Sarmento, Bruno Filipe Carmelino Cardoso #16,392 |
| Neurology & Neurosurgery | 20 | 1.9% | 8 | Ferro, José Manuel #14,202 |
| General & Internal Medicine | 17 | 1.6% | 3 | Cruz-Martins, Natália #3,221 |
| Sport Sciences | 17 | 1.6% | 8 | Clemente, Filipe Manuel #5,920 |
| Oncology & Carcinogenesis | 14 | 1.3% | 2 | Cardoso, Fatima #11,588 |
| Dentistry | 11 | 1.0% | 2 | Chambrone, Leando A. #44,901 |
| Cardiovascular System & Hematology | 9 | 0.8% | 6 | Ferreira, João Pedro #16,785 |
| Gastroenterology & Hepatology | 8 | 0.8% | 4 | MacHado, Mariana Verdelho #17,544 |
| Immunology | 8 | 0.8% | 3 | Veldhoen, Marc #33,617 |
| Legal & Forensic Medicine | 7 | 0.7% | 1 | Dinis-Oliveira, R. J. #6,129 |
| Obstetrics & Reproductive Medicine | 6 | 0.6% | 1 | Ayres-De-Campos, Diogo #59,991 |
| Ophthalmology & Optometry | 5 | 0.5% | 1 | Cunha-Vaz, José Guilherme F. #97,713 |
| Arthritis & Rheumatology | 4 | 0.4% | 1 | da Silva, J. A.P. #95,838 |
| Emergency & Critical Care Medicine | 4 | 0.4% | 2 | Póvoa, Pedro R. #23,718 |
| Surgery | 4 | 0.4% | 2 | Búchler, Markus Wolfgang #15,579 |
| Urology & Nephrology | 4 | 0.4% | 0 | Gameiro, Joana #273,555 |
| Dermatology & Venereal Diseases | 3 | 0.3% | 1 | Torres, Tiago #39,075 |
| Endocrinology & Metabolism | 3 | 0.3% | 1 | Sena, Cristina Maria #94,432 |
| Nuclear Medicine & Medical Imaging | 3 | 0.3% | 0 | Jones, John Griffith #163,834 |
| Pathology | 3 | 0.3% | 1 | Schmitt, F. C. #84,950 |
| Respiratory System | 3 | 0.3% | 0 | Marques, Alda Sofia Pires De Dias #183,399 |
| Anesthesiology | 2 | 0.2% | 0 | Azevedo, Luís F. #320,441 |
| Orthopedics | 2 | 0.2% | 0 | Andrade, Renato #241,130 |
| Otorhinolaryngology | 2 | 0.2% | 0 | Hellquist, Henrik B. #461,919 |
| Psychiatry | 2 | 0.2% | 2 | Nijenhuis, Ellert R.S. #68,984 |
| Tropical Medicine | 2 | 0.2% | 0 | Ferreira, Marcelo Urbano #279,236 |
| Allergy | 1 | 0.1% | 0 | Sousa-Pinto, Bernardo #137,021 |
| Pediatrics | 1 | 0.1% | 0 | Rocha, Gustavo Marcondes Duarte #245,663 |
| Enabling & Strategic Technologies · 146 listed authors (13.8%) |
| Energy | 54 | 5.1% | 21 | Nunes, Leonel J.R. #5,976 |
| Materials | 41 | 3.9% | 15 | Davim, J. P. #1,224 |
| Optoelectronics & Photonics | 21 | 2.0% | 1 | Marques, Carlos Alberto F. #57,900 |
| Biotechnology | 20 | 1.9% | 8 | de Carvalho, C. C. C. R. #18,208 |
| Nanoscience & Nanotechnology | 5 | 0.5% | 5 | Conde, Joao #22,569 |
| Strategic, Defence & Security Studies | 4 | 0.4% | 1 | Zêzere, José Luís #83,977 |
| Engineering · 122 listed authors (11.5%) |
| Biomedical Engineering | 24 | 2.3% | 8 | Mano, João F. #4,651 |
| Civil Engineering | 19 | 1.8% | 4 | Guedes Soares, C. #2,322 |
| Chemical Engineering | 17 | 1.6% | 11 | Pereira Coutinho, João Araújo #11,408 |
| Electrical & Electronic Engineering | 16 | 1.5% | 1 | Cardoso, A. J.M. #39,768 |
| Mechanical Engineering & Transports | 16 | 1.5% | 1 | Murshed, S. M.s. #23,345 |
| Industrial Engineering & Automation | 10 | 0.9% | 5 | Leitão, Paulo #35,388 |
| Geological & Geomatics Engineering | 5 | 0.5% | 3 | Jose M., Bioucas-Dias Manuel #6,180 |
| Operations Research | 4 | 0.4% | 0 | Figueira, José Rui #133,779 |
| Environmental Engineering | 3 | 0.3% | 1 | Marques, Rui Cunha #27,197 |
| Aerospace & Aeronautics | 2 | 0.2% | 0 | Suleman, Afzal #252,209 |
| Mining & Metallurgy | 1 | 0.1% | 0 | Nogueira, Carlos A. #579,788 |
| Chemistry · 118 listed authors (11.1%) |
| Medicinal & Biomolecular Chemistry | 27 | 2.5% | 4 | Fernandes, Eduarda G.R. #38,576 |
| Analytical Chemistry | 20 | 1.9% | 6 | Brett, Christopher Michael Ashton #17,259 |
| Polymers | 20 | 1.9% | 5 | Banea, M. D. #17,127 |
| Organic Chemistry | 18 | 1.7% | 5 | Silva, Artur M.S. #63,724 |
| Inorganic & Nuclear Chemistry | 16 | 1.5% | 5 | Mohan, Brij #11,002 |
| Physical Chemistry | 7 | 0.7% | 4 | Carabineiro, Sónia A.C. #16,861 |
| Biomedical Research · 86 listed authors (8.1%) |
| Microbiology | 38 | 3.6% | 8 | Manaia, Celia #8,375 |
| Toxicology | 17 | 1.6% | 3 | Carvalho, Felix Dias #61,247 |
| Biochemistry & Molecular Biology | 14 | 1.3% | 3 | Vitorino, R. Miguel Pinheiro #29,700 |
| Developmental Biology | 5 | 0.5% | 2 | Seabra, Miguel C. #78,627 |
| Mycology & Parasitology | 4 | 0.4% | 2 | Phillips, Alan J.L. #20,197 |
| Nutrition & Dietetics | 4 | 0.4% | 3 | Ravasco, Paula #25,887 |
| Biophysics | 2 | 0.2% | 0 | Santos, Nuno C. #212,424 |
| Virology | 2 | 0.2% | 0 | Taveira, Nuno Costa #265,292 |
| Anatomy & Morphology | 1 | 0.1% | 0 | Moxham, Bernard John #619,945 |
| Agriculture, Fisheries & Forestry · 76 listed authors (7.2%) |
| Food Science | 40 | 3.8% | 26 | Ferreira, Isabel C.F.R. #8,080 |
| Dairy & Animal Science | 10 | 0.9% | 1 | Mestre Prates, José António #24,806 |
| Forestry | 10 | 0.9% | 3 | Pereira, Helena M. #16,139 |
| Fisheries | 8 | 0.8% | 1 | Oliva-Teles, A. #21,613 |
| Agronomy & Agriculture | 5 | 0.5% | 1 | Pereira, Luis S. #6,503 |
| Veterinary Sciences | 5 | 0.5% | 0 | Spínola, Maria Pinheiro #402,461 |
| Physics & Astronomy · 62 listed authors (5.8%) |
| Nuclear & Particle Physics | 22 | 2.1% | 9 | Lobo, Francisco S.N. #3,281 |
| Applied Physics | 19 | 1.8% | 5 | Martins, Rodrigo Ferrão Paiva #16,075 |
| Chemical Physics | 15 | 1.4% | 1 | Vareda, João P. #48,036 |
| Astronomy & Astrophysics | 6 | 0.6% | 4 | Brinchmann, Jarle #16,813 |
| Fluids & Plasmas | 5 | 0.5% | 2 | Pereira, José Carlos Fernandes #4,338 |
| Acoustics | 3 | 0.3% | 0 | Figueiredo, Eloi #151,233 |
| Mathematical Physics | 2 | 0.2% | 0 | Lopes, António Mendes #128,924 |
| General Physics | 1 | 0.1% | 1 | Konotop, Vladimir V. #54,112 |
| Optics | 1 | 0.1% | 0 | Huidobro, Paloma Arroyo #268,705 |
| Economics & Business · 51 listed authors (4.8%) |
| Business & Management | 27 | 2.5% | 27 | Ferreira, João J. #6,909 |
| Sport, Leisure & Tourism | 7 | 0.7% | 7 | Kastenholz, Elisab̧eth #20,055 |
| Marketing | 6 | 0.6% | 6 | Loureiro, Sandra María Correia #1,417 |
| Economics | 4 | 0.4% | 4 | Afonso, António #24,735 |
| Finance | 2 | 0.2% | 2 | Ferreira, Miguel A. #43,537 |
| Logistics & Transportation | 2 | 0.2% | 1 | Vale, David Sousa #60,148 |
| Information & Communication Technologies · 50 listed authors (4.7%) |
| Artificial Intelligence & Image Processing | 37 | 3.5% | 11 | Gama, João M.P. #5,365 |
| Networking & Telecommunications | 9 | 0.8% | 1 | Rodriguez, Jonathan #48,181 |
| Computation Theory & Mathematics | 1 | 0.1% | 0 | Ilić, Aleksandar #281,126 |
| Computer Hardware & Architecture | 1 | 0.1% | 0 | Véstias, Mário P. #330,505 |
| Information Systems | 1 | 0.1% | 1 | Oliveira, Tiago André Gonçalves Félix De #10,772 |
| Medical Informatics | 1 | 0.1% | 0 | Lapão, Luis Velez #230,347 |
| Biology · 38 listed authors (3.6%) |
| Plant Biology & Botany | 16 | 1.5% | 7 | Miguel, Maria Graça Costa #13,216 |
| Marine Biology & Hydrobiology | 15 | 1.4% | 6 | Pereira, Leonel #5,334 |
| Ecology | 4 | 0.4% | 4 | Cardoso, Pedro #12,874 |
| Zoology | 2 | 0.2% | 0 | Carretero, Miguel Ángel #192,095 |
| Evolutionary Biology | 1 | 0.1% | 0 | Pacheco, Jorge M. #116,761 |
| Earth & Environmental Sciences · 27 listed authors (2.5%) |
| Environmental Sciences | 24 | 2.3% | 17 | Prata, Joana Correia #1,072 |
| Meteorology & Atmospheric Sciences | 8 | 0.8% | 6 | Pires, José C.M. #26,988 |
| Geochemistry & Geophysics | 1 | 0.1% | 1 | Brilha, José Bernardo Rodrigues #13,193 |
| Oceanography | 1 | 0.1% | 0 | Ferreira, Óscar Manuel #267,665 |
| Built Environment & Design · 11 listed authors (1.0%) |
| Building & Construction | 10 | 0.9% | 7 | Lourenço, Paulo B. #5,738 |
| Design Practice & Management | 3 | 0.3% | 1 | Flores, Paulo #13,909 |
| Urban & Regional Planning | 1 | 0.1% | 1 | Medeiros, Eduardo José Rocha #62,996 |
| Social Sciences · 9 listed authors (0.8%) |
| Education | 5 | 0.5% | 2 | Flores, Maria Assunção #12,025 |
| Information & Library Sciences | 1 | 0.1% | 0 | Vieira, Elizabeth S. #307,111 |
| Law | 1 | 0.1% | 1 | De Gregorio, Giovanni #50,368 |
| Political Science & Public Administration | 1 | 0.1% | 1 | Magalhães, Pedro C. #58,772 |
| Science Studies | 1 | 0.1% | 1 | Mendonça, Sandro #94,506 |
| Social Work | 1 | 0.1% | 0 | Magalhães, Eunice Vieira #173,130 |
| Mathematics & Statistics · 9 listed authors (0.8%) |
| General Mathematics | 7 | 0.7% | 3 | Almeida, Ricardo #11,073 |
| Applied Mathematics | 1 | 0.1% | 0 | Yang, Shiyuan #181,244 |
| Numerical & Computational Mathematics | 1 | 0.1% | 0 | Raydan, Marcos #123,556 |
| Public Health & Health Services · 8 listed authors (0.8%) |
| Nursing | 6 | 0.6% | 1 | Laranjeira, C. A. #95,426 |
| Public Health | 3 | 0.3% | 2 | Marôco, João P. #25,640 |
| Gerontology | 2 | 0.2% | 0 | Gomes, Barbara #122,753 |
| Health Policy & Services | 2 | 0.2% | 1 | Ferreira, Pedro L. #72,159 |
| Psychology & Cognitive Sciences · 5 listed authors (0.5%) |
| Behavioral Science & Comparative Psychology | 3 | 0.3% | 1 | Oliveira, Rui Filipe #47,617 |
| Social Psychology | 3 | 0.3% | 3 | Batel, Susana #28,707 |
| Clinical Psychology | 1 | 0.1% | 1 | Pinto-Gouveia, José Pinto #98,311 |
| Historical Studies · 4 listed authors (0.4%) |
| Archaeology | 3 | 0.3% | 1 | Zilha̧o, João #60,049 |
| Philosophy & Theology · 3 listed authors (0.3%) |
| Applied Ethics | 1 | 0.1% | 0 | Raposo, Vera L.úcia #119,975 |
| Philosophy | 1 | 0.1% | 0 | Macagno, Fabrizio #113,983 |
| Religions & Theology | 1 | 0.1% | 0 | Fedele, Anna #613,634 |
| Communication & Textual Studies · 2 listed authors (0.2%) |
| Communication & Media Studies | 1 | 0.1% | 1 | Carvalho, Anabela #61,889 |
| Literary Studies | 1 | 0.1% | 0 | Vieira, Patrícia #549,286 |