| Marília | Dourado | Faculdade de Medicina -Universidade de coimbra | Portugal | Medicine and Dentistry | Medicina Paliativa e Medicina da Dor | worldtopscientists.com |
| Marilene | Oliveira | unifesspa | Brazil | Chemistry | Química Orgânica/Química de Produtos Naturais/Química d emicrorganismo | |
| Marija | Koprivica | Institute for Technology of Nuclear and Other Mineral Raw Materials | Serbia | Environmental Science | Waste Management and Biosorption | worldtopscientists.com |
| Mariano | Luque Gallego | Universidad de Málaga | Spain | Economics, Econometrics and Finance | Operations Research | worldtopscientists.com |
| Mariangela | Di Vincenzo | Università Politecnica delle Marche | Italy | Biochemistry, Genetics and Molecular Biology | Stem Cells | worldtopscientists.com |
| Mariana | Egea | Goiano Federal Institute (IFGOIANO) | Brazil | Agricultural and Biological Sciences | Food Science and Technology | worldtopscientists.com |
| María Salomé | Álvarez | Universidade de Vigo | Spain | Chemical Engineering | química | worldtopscientists.com |
| maria livia | ognean | Lucian Blaga University Sibiu | Romania | Biochemistry, Genetics and Molecular Biology | Genetics | worldtopscientists.com |
| María Inmaculada | Mohino-Herranz | INTA | Spain | Engineering | Inteligencia Artificial | worldtopscientists.com |
| María Angélica | Ouellette | Lakeland Agricultural Research Association | Canada | Agricultural and Biological Sciences | Weed Science | worldtopscientists.com |
| Maria | Hedman-Lagerlöf | Karolinska institutet | Sweden | Psychology | clinical psychology, chronic pain, internet-delivered therapy, blended therapy | worldtopscientists.com |
| Maria | Morales-Suárez-Varela | Valencia University (Spain) | Spain | Pharmacology, Toxicology and Pharmaceutical Science | medicine and pharmacy | worldtopscientists.com |
| MARIA | HRMOVA | Adelaide University | Australia | Biochemistry, Genetics and Molecular Biology | Computational biology | worldtopscientists.com |
| Marcos | Delgado | Institute of Intensive Care Medicine, University Hospital Zurich | Switzerland | Health Professions | Intensivmedizin | worldtopscientists.com |
| Marcelo | Prado da Silva | Instituto Militar de Engenharia | Brazil | Materials Science | Biocerâmicas | worldtopscientists.com |
| MARCELLE | DANELON | São Paulo State University (Unesp), School of Dentistry, Araçatuba. | Brazil | Medicine and Dentistry | Biomateriais | |
| Manuela | Bombana | Univeristy Hospital Heidelberg | Germany | Health Professions | Health Services Research | worldtopscientists.com |
| Manuel | Correia | UNICAMP | Brazil | Energy | Reservoir Geoengineering | worldtopscientists.com |
| Manuel | Bethencourt | University of Cadiz | Spain | Materials Science | Earth and Planetary Sciences | worldtopscientists.com |
| Mantosh Kumar | Satapathy | Taipei Medical University | Taiwan | Pharmacology, Toxicology and Pharmaceutical Science | Advanced Drug Delivery, Biomedical Materials & Tissue Engineering, Nanobiotechnology, Cancer Molecular Biology | worldtopscientists.com |