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Few scientists question the usefulness of randomized controlled trials in assessing the efficacy of medical interventions. Those who argue for more evidence-based medicine frequently highlight the importance of randomized controlled trials,

Occupational epidemiology seeks to identify hazardous exposures in the workplace using various methods of research. The gold standard for such research is the occupational cohort study, in which workers are enrolled and followed throughout their care

Parents of children with cerebral palsy (CP) often ask their care givers whether their child will eventually walk independently.