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Differences among three acupuncture groups
| EA | MA | SA | |
|---|---|---|---|
| Points stimulated | Acupoints | Acupoints | Non-acupoints |
| Number of points | 8 | 8 | 8 |
| Depth of acupuncture (mm) | ≥10 | ≥10 | 2–3 |
| Manipulation | Y | Y | N |
| De qi | Y | Y | N |
| Electrical apparatus | Attached | Attached | Attached |
| Electric current | Y | N | N |
| Needle retention (min) | 30 | 30 | 30 |
| Number of sessions | 24 | 24 | 24 |
