title: Letter: Vitamin E, selenium, and knee problems.
mesh_terms: D000293:Adolescent; D002357:Cartilage Diseases / Q000209:etiology*; D006801:Humans; D007719:Knee Joint; D008297:Male; D012643:Selenium / Q000627:therapeutic use; D014810:Vitamin E / Q000627:therapeutic use
chemical_list: D014810:Vitamin E; D012643:Selenium