Figure 3

The auricular acupoints selected.
Shenmen (TF4, located at the bifurcation of the crura of antihelix), Endocrine (CO18, located at the bottom part of the incisura intertragica) and Internal Genitals (TF2, located at the middle point of anterior portion of the triangular fossa) were selected in auricular acupressure (AA) group; Triple Energizer (CO17, located in the cavum conchae), Stomach (CO4, located at the commissure of superior concha and inferio concha, just below the disappearance of the crus of the helix) and Large Intestine (CO7, located at the inner 1/3 of the crus of the helix, lying at the lower portion of the superior concha) were selected in Sham-AA group.