In the control group , acupuncture was used at Pishu ( BL 20 ) , Zhongwan ( CV 12 ) , Shenshu ( BL 23 ) , Zhongji ( CV 3 ) , Guanyuan ( CV 4 ) , Mingmen ( GV 4 ) , Taibai ( SP 3 ) , Fenglong ( ST 40 ) , etc. ; warm acupuncture was applied at Pishu ( BL 20 ) , Zhongwan ( CV 12 ) , Shenshu ( BL 23 ) and Zhongji ( CV 3 ) ; the treatment was required once every two days and for 3 months continuously .