METHODS	Fifty-nine cases of knee OA were randomly divided into a moxibustion group ( 31 cases ) and a placebo moxibustion group ( 28 cases ) , in which moxa cone and placebo moxa sticker were applied to Neixiyan ( EX-LE 4 ) , Dubi ( ST 35 ) and Ashi points separately , 3 cones on each point in each treatment .\