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Frequency of acupoints used in studies.
| Frequency, n (%) | Acupoints | Involved studies |
|---|---|---|
| 7 (58.33) | GV20 | [28, 29, 33–35, 38, 39] |
| 5 (41.67) | CV6 | [27, 32, 36, 37, 40] |
| CV12 | ||
| CV17 | ||
| SP10 | ||
| ST36 | ||
| 3 (25.00) | BL23 | [34, 35, 38] |
| 1 (8.33) | TE4 | [29] |
Abbreviations. BL23, Shenshu; CV6, Qihai; CV12, Zhongwan; CV17, Danzhong; GV20, Baihui; SP10, Xuehai; ST36, Zusanli; TE4, Yangji.
