Table 1 Protocol for acupoints

BL23 (Shenshu)

In the lumbar region, at the same level as the inferior border of the spinous process of the second lumbar vertebra (L2). 1.5 B-cun lateral to the posterior median line.

BL25 (Dachangshu)

In the lumbar region, at the same level as the inferior border of the spinous process of the fourth lumbar vertebra (L4). 1.5 B-cun lateral to the posterior median line.

BL40 (Weizhong)

On the posterior aspect of the knee, at the midpoint of the popliteal crease.

SP6 (Sanyinjiao)

On the tibial aspect of the leg, posterior to the medial border of the tibia, 3 B-cun superior to the prominence of the medial malleolus.

KI3 (Taixi)

On the posteromedial aspect of the ankle, in the depression between the prominence of the medial malleolus and the calcaneal tendon.