| Researchers study etiology in order to develop more effective approaches to treatment and, ultimately, prevention. |
| The etiology, natural history, and optimal treatment of respiratory failure have been the subject of active investigation for over 100 years. |
| Rheumatoid arthritis is a debilitating, chronic multisystem disease with an unknown etiology. |
| This article reviews the epidemiology, etiology, and diagnosis of seizure disorders in the elderly. |
| She presented one year ago with fever, weakness, hepatitis and pneumonitis of unknown etiology. |
| Our study found that clinical and radiographic findings were useful predictors of the etiology of one or more pulmonary nodules. |
