Figure 2

Locations of acupoint (LineA: RenMeridian, LineB: Stomach Meridian). The acupoints were located as follows: (i) ST25(Tianshu), 2 cun lateral to the centre of the umbilicus; (ii)Ren12(Zhongwan), on the middle of the abdomen, 4 cun above the umbilicus; (iii)Ren6(Qihai), on the midline of the abdomen,1.5cun below the umbilicus. It’s 8 cun from xiphoid process to the center of the umbilicus and 5cun between the center of the umbilicus and the upper border of symphysis pubis.