title: Letter: Vitamin E, selenium, and knee problems.
mesh_terms: D001168:Arthritis / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D007719:Knee Joint; D008023:Ligaments, Articular; D012643:Selenium / Q000008:administration & dosage / Q000627:therapeutic use*; D014810:Vitamin E / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D014810:Vitamin E; D012643:Selenium