Results
Fifty-two participants (mean age 26.1; range 16 to 35 years) were randomly assigned to either the audiovisual (26 participants) or control group (26 participants). Females represented almost two-thirds of the sample (69.2%) in comparison to males (30.8%). All participants were from the Chinese Han ethnicity. Three participants dropped out from the audiovisual group, and five from the control group (Fig. Baseline characteristics.