EA was applied during the first 15 days of sickness in the two groups , at Xiaguan ( ST 7 ) , Jiache ( ST 6 ) , Dicang ( ST 4 ) , Yangbai ( GB 14 ) , Taiyang ( EX-HN 5 ) , Quanliao ( SI 18 ) and Hegu ( LI 4 ) , once a day .