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| 3 | Radiography 🔗 | 2007- | Clinical Key | 33 |
| 4 | Radiologic Clinics of North America 🔗 | 2007- | Clinical Key | 24 |
| 5 | Radiology 🔗 | 2011- | Clinical Key | 17 |
| 6 | Radiology (เข้าใช้ฉบับย้อนหลังตั้งแต่ปี 1923 - ฉบับปัจจุบัน) 🔗 | 1923- | Subscription | 22 |
| 7 | Radiology Advances 🔗 | 2024- | Oxford | 20 |
| 8 | Radiology Case Reports 🔗 | 2011- | Clinical Key | 18 |
| 9 | Radiology of Infectious Diseases 🔗 | 2014- | Clinical Key | 19 |
| 10 | Radiotherapy and Oncology 🔗 | 2007- | Clinical Key | 22 |
| 11 | Regenerative Biomaterials 🔗 | 2014- | Oxford | 21 |
| 12 | Regional Anesthesia 🔗 | (1976-1997) | Ovid | 18 |
| 13 | Regional Anesthesia and Pain Medicine 🔗 | (2011-2019) | Ovid | 23 |
| 14 | Regional Anesthesia and Pain Medicine 🔗 | 1976- | BMJ | 28 |
| 15 | Rehabilitation Nursing Journal 🔗 | 1975- | Ovid | 24 |
| 16 | Rehabilitation Oncology 🔗 | 2011- | Ovid | 21 |
| 17 | Reports of Practical Oncology and Radiotherapy 🔗 | 2007- | Clinical Key | 24 |
| 18 | Reproduction 🔗 | 1960- | Oxford | 21 |
| 19 | Reproductive & Developmental Medicine 🔗 | 2017- | Ovid | 19 |
| 20 | Reproductive Biology 🔗 | 2008- | Clinical Key | 19 |
| 21 | Research Evaluation 🔗 | 1991- | Oxford | 21 |
| 22 | Respiration 🔗 | 1998- | Karger | 20 |
| 23 | Respiratory Investigation 🔗 | 2012- | Clinical Key | 21 |
| 24 | Respiratory Medicine 🔗 | 2007- | Clinical Key | 18 |
| 25 | Respiratory Medicine Case Reports 🔗 | 2012- | Clinical Key | 24 |
| 26 | Respiratory Physiology & Neurobiology 🔗 | 2007- | Clinical Key | 23 |
| 27 | Resuscitation 🔗 | 2007- | Clinical Key | 22 |
| 28 | Retina 🔗 | 2000- | Ovid | 20 |
| 29 | Retinal Cases & Brief Reports 🔗 | 2007- | Ovid | 29 |
| 30 | Reviews and Research in Medical Microbiology 🔗 | 2022- | Ovid | 18 |
| 31 | Reviews in Medical Microbiology 🔗 | (2001-2022) | Ovid | 23 |
| 32 | Rheumatic Diseases Clinics of North America 🔗 | 2007- | Clinical Key | 21 |
| 33 | Rheumatology 🔗 | 1996- | Oxford | 18 |
| 34 | Rheumatology Advances in Practice 🔗 | 2017- | Oxford | 18 |
| 35 | Rhinology 🔗 | 1997- | Subscription | 21 |
| 36 | RMD Open Rheumatic and Musculoskeletal Diseases 🔗 | 2015- | BMJ | 23 |
