In the auricular points group , the magnetic-ball sticking therapy was applied to subcortex ( pizhixia , AT@ ) , brainstem ( naogan , AT ( @,@ i ) ) , mouth ( kou , CO@ ) , cheek ( mianjia , LO ( @,@ i ) ) , tongue ( she , LO@ ) and throat ( yanhou , TG@ ) on one ear each time , and were changed on the other ear once every @ days .