Rabies   17 studies
Radiation Injuries   22 studies
Radiation Pneumonitis   2 studies
Radiculopathy   26 studies
Radiodermatitis   4 studies
Radius Fractures   27 studies
Rare Diseases   348 studies
Rasmussen encephalitis   2 studies
Raynaud Disease   18 studies
Reactive Attachment Disorder   1 study
Rectal cancer   626 studies
Rectal Diseases   1276 studies
Rectal Fistula   10 studies
Rectal Neoplasms   625 studies
Rectal Prolapse   45 studies
Rectocele   10 studies
Recurrence   5211 studies
Recurrent respiratory papillomatosis   7 studies
Red-Cell Aplasia, Pure   27 studies
Reflex Sympathetic Dystrophy   9 studies
Reflex sympathetic dystrophy syndrome   9 studies
Reflex, Abnormal   4 studies
Refractive Errors   126 studies
Refractory anemia   188 studies
Refsum Disease   2 studies
Refsum Disease, Infantile   2 studies
Refsum disease, infantile form   2 studies
Reiter's Syndrome   5 studies
Relapsing Fever   1 study
REM Sleep Behavior Disorder   2 studies
Renal Artery Obstruction   15 studies
Renal artery stenosis   17 studies
Renal cancer   656 studies
Renal hypertension   6 studies
Renal Insufficiency   820 studies
Renal Insufficiency, Acute   75 studies
Renal Insufficiency, Chronic   652 studies
Renal Osteodystrophy   13 studies
Reperfusion Injury   51 studies
Respiration Disorders   993 studies
Respiratory Aspiration   2 studies
Respiratory Distress Syndrome, Adult   185 studies
Respiratory distress syndrome, infant   5 studies
Respiratory Distress Syndrome, Newborn   18 studies
Respiratory Hypersensitivity   1117 studies
Respiratory Insufficiency   146 studies
Respiratory Paralysis   1 study
Respiratory Sounds   22 studies
Respiratory Syncytial Virus Infections   22 studies
Respiratory Tract Diseases   6326 studies
Respiratory Tract Infections   1500 studies
Respirovirus Infections   1 study
Restless Legs Syndrome   68 studies
Retinal Artery Occlusion   3 studies
Retinal Degeneration   452 studies
Retinal Detachment   22 studies
Retinal Diseases   734 studies
Retinal Hemorrhage   2 studies
Retinal Neoplasms   36 studies
Retinal Neovascularization   4 studies
Retinal Perforations   13 studies
Retinal Vasculitis   6 studies
Retinal Vein Occlusion   45 studies
Retinitis   98 studies
Retinitis Pigmentosa   34 studies
Retinitis pigmentosa-deafness syndrome   5 studies
Retinoblastoma   41 studies
Retinopathy of Prematurity   25 studies
Retinoschisis   2 studies
Retrocochlear Diseases   24 studies
Retrognathism   1 study
Retroperitoneal Fibrosis   1 study
Retroperitoneal Neoplasms   1 study
Retroviridae Infections   2780 studies
Rett Syndrome   11 studies
Rh Isoimmunization   1 study
Rhabdoid Tumor   39 studies
Rhabdomyolysis   6 studies
Rhabdomyosarcoma   159 studies
Rhabdomyosarcoma, Embryonal   5 studies
Rheumatic Diseases   1413 studies
Rheumatic Fever   6 studies
Rheumatic Heart Disease   6 studies
Rhinitis   338 studies
Rhinitis, Allergic, Perennial   68 studies
Rhinitis, Allergic, Seasonal   176 studies
Rhinitis, Atrophic   2 studies
Rhinitis, Vasomotor   5 studies
Rhinoscleroma   1 study
Rib Fractures   5 studies
Richter syndrome   5 studies
Rickets   24 studies
Rickettsia Infections   3 studies
Rickettsial disease   3 studies
Rickettsiosis   3 studies
Rift Valley Fever   3 studies
Rod myopathy   1 study
Root Resorption   1 study
Rosacea   20 studies
Rotavirus Infections   15 studies
Roussy Levy hereditary areflexic dystasia   42 studies
Rubella   41 studies
Rupture   52 studies