title: [Clinical studies in casualty surgery. II: hypothesis formulation and hypothesis testing].
authors.affiliation: Klinische Epidemiologie, Klinik für Unfall- und Wiederherstellungschirurgie, Unfallkrankenhaus, Berlin. dirk.stengel@ukb.de
authors.forename: D
authors.initials: D
authors.lastname: Stengel
authors.forename: R
authors.initials: R
authors.lastname: Lefering
mesh_terms: D016022:Case-Control Studies; D015331:Cohort Studies; D018849:Controlled Clinical Trials as Topic / Q000379:methods*; D004635:Emergency Medicine / Q000379:methods*; D015340:Epidemiologic Research Design; D019317:Evidence-Based Medicine / Q000379:methods*; D006801:Humans; D012107:Research Design; D013514:Surgical Procedures, Operative / Q000379:methods*; D014194:Traumatology / Q000379:methods*