Social support was assessed with the 23-item Duke Social Support Index (DSSI) [53], a multidimensional self-report measure assessing Social Interaction (SI; 4 items), Perceived Social Support (PSS; 7 items), and Instrumental Support (ISS; 12 items). We assessed the internal consistency of the SI (α=.61), PSS (α=.70), and IS subscales (α=.78) at this study's pre-treatment assessment.