Table 2: Summary of main acupoints/sites selected in the reviewed studies.

Acupoints/sitesFrequency of appearance ( )Percentage ( )

Zusanli (ST36)731.82
Sanyinjiao (SP6)627.27
Hegu (LI4)627.27
Neiguan (PC6)522.72
Shenmen (HT7)313.64
Laogone (PC8)313.64
Sympathetic (ear)313.64
Shenmen (ear)313.64
Kidney (ear)313.64
Lung (ear)313.64
Liver (ear)29.09
Waiguan (SJ5)29.09
Baihui (GV20/DU20)29.09
Dazhui (GV14/DU14)29.09
Jiaji (EX-B2)14.55
Shenshu (BL23)14.55
Sishencong (EX-HN1)14.55
Taichong (LR3)14.55
Shendao (GV11)14.55
Lingtai (GV10)14.55
Zhiyang (GV9)14.55
Mingmen (GV4)14.55

Note. The sum was 22 for the percentage calculation.