| Dr | Roxana Andra | Coman | Endoplus Clinic | Romania | |
| Prof Dr | Rolf | Teschke | KLINIKUM Hanau, Goethe University Frangkfurt Germany | Germany | |
| Assist Prof Dr | Roksana | Malak | Dr Roksana Malak | Poland | |
| Prof | Riheb | HADJI | Setif 1 University | Algeria | |
| Assoc Prof Dr | Rifat | Olgun | Akdeniz University | Turkey | |
| Dr | Ridha | Guebsi | INRS | Canada | |
| Prof Dr | Richard | Alexander | Vienna University of Economics and Business | Austria | |
| Mr | Reza | Shahouni | Iran University of Science and Technology | Iran | |
| Dr | Renan | Tosin | Department of Geosciences, Environment and Spatial Planning, Faculty of Sciences of the University of Porto | Portugal | |
| Assist Prof Dr | Rebaz | OMER | Koya University | Iraq | |
| Mr | Raul | Alves | Câmara Municipal de Machico | Portugal | |
| Dr | Rasim | Simsek | Bilecik Seyh Edebali University | Turkey | |
| Assoc Prof Dr | RASHMI | RANA | Sir Ganga Ram Hospital | India | |
| Dr | Rasheed | Akbar | The University of Haripur | Pakistan | |
| Mr | Ralph | Wendt | Klinikum St. Georg Leipzig, Klinik für Nephrologie | Germany | |
| Dr | Racquel | Gaetani | LAHEY HOSPITAL AND MEDICAL CENTER | United States | |
| Mr | Probir Kumar | Mittra | Chungbuk National University | South Korea | |
| Mr | Pranjal | Khakse | University of Michigan | United States | |
| Dr | Pegah | Khosravani | Soil Science & Geomorphology | Germany | |
| Dr | Paweł | Kwaśnicki | Catholic University of Lublin | Poland | |