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- Rash 13 total
- Raynaud's Disease 0 total
- Razor Bumps (Pseudofolliculitis Barbae) 0 total
- Rectal Cancer 26 total
- Rectal Disorders 73 total
- Recurrent Diarrhea 0 total
- Recurrent Ovarian Cancer 2 total
- Recurrent Pregnancy Loss 1 total
- Recurrent Respiratory Papillomatosis 1 total
- Red Cell Disorders 0 total
- Reflex Sympathetic Dystrophy Syndrome (RSDS) 0 total
- Reiter's Syndrome 1 total
- Renal Anemia 3 total
- Renal Artery Disease 0 total
- Renal Cancer 15 total
- Renal Cell Cancer 16 total
- Renal Cell Carcinoma 9 total
- Renal Failure 49 total
- Reproductive Health 2 total
- Respiratory Failure 102 total
- Respiratory Syncytial Virus (RSV) Infection 4 total
- Restless Leg Syndrome 0 total
- Retina 56 total
- Retinitis Pigmentosa 12 total
- Retinoblastoma 4 total
- Rhabdomyosarcoma 3 total
- Rheumatic Fever 3 total
- Rheumatoid Arthritis 47 total
- Rheumatoid Arthritis (Pediatric) 0 total
- Rhinitis, Allergic, Perennial 1 total
- Rosacea 8 total
- Rotavirus 4 total
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