Table 1 Location of acupoints in electro-acupuncture group

On the upper abdomen, 2 cun lateral to the center of the umbilicus

On the lower abdomen, 1.3 cun inferior to the center of the umbilicus, 4 cun lateral to the anterior median line

On the lateral aspect of the elbow, at the midpoint of the line connecting LU5 with the lateral epicondyle of the humerus

On the posterior aspect of the forearm, midpoint of the interosseous space between the radius and the ulna, 3 cun proximal to the dorsal wrist crease

On the anterior aspect of the leg, on the line connecting ST35 with ST41, 6 cun inferior to ST35

On the dorsum of the hand, radial to the midpoint of the second metacarpal bone

On the dorsum of the foot, between the first and second metatarsal bones, in the depression distal to the junction of the bases of the two bones, over the dorsalis pedis artery

On the anterior aspect of the leg, on the line connecting ST35 with ST41, 3 cun inferior to ST35