title: [Analytic epidemiologic approach to the studies in the field of orthopaedic surgery].
authors: Y
authors: Y
authors: Hirota
mesh_terms: D000063:Accidents, Traffic; D000293:Adolescent; D000328:Adult; D000437:Alcoholism / Q000453:epidemiology; D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D004812:Epidemiologic Methods; D005271:Femur Head Necrosis / Q000453:epidemiology / Q000601:surgery; D006801:Humans; D009049:Motorcycles; D009985:Orthopedics; D012189:Retrospective Studies