title: [Method of studying the epidemiology of malignant tumors of the upper respiratory tracts in the Ukraine].
mesh_terms: D004812:Epidemiologic Methods; D006801:Humans; D010038:Otorhinolaryngologic Diseases / Q000453:epidemiology*; D012142:Respiratory Tract Neoplasms / Q000453:epidemiology*; D014455:Ukraine