title: Surgery for knee arthritis doesn't beat placebo.
mesh_terms: D001168:Arthritis / Q000601:surgery*; D001182:Arthroscopy / Q000191:economics; D018849:Controlled Clinical Trials as Topic; D006801:Humans; D007717:Knee / Q000601:surgery*; D008297:Male; D010919:Placebos; D016896:Treatment Outcome; D014481:United States
chemical_list: D010919:Placebos