title: [Methodological forms of clinical studies in surgery: indication and evaluation].
mesh_terms: D002986:Clinical Trials as Topic; D003933:Diagnosis; D013502:General Surgery; D006801:Humans; D008499:Medical Records; D011446:Prospective Studies; D011786:Quality Control; D011897:Random Allocation; D012107:Research Design; D012189:Retrospective Studies; D012306:Risk; D013274:Stomach Neoplasms / Q000601:surgery; D013812:Therapeutics
vernacular_title: Methodische Formen klinischer Studien in der Chirurgie: Indikation und Bewertung.