“…For example, the three main themes that organize our findings were arrived at by a process of first searching for patterns in frequency, setting, and types of poly-drug use, but it became clear that the meaning of poly-drug use was the most salient issue for the majority of respondents. The use of quantitative and qualitative data allowed for triangulation (Caudle, 1994;Creswell, 1994;Denzin, 1970;Hunt, Joe-Laidler, & Evans, 2002;Lempert & Monsa, 1994;Lincoln & Guba, 1985;Lofland, Snow, Anderson, & Lofland, 2006;Nichter, Quintero, Nichter, Mock, & Shakib, 2004;Rhineberger, Hartmann, & Van Valey, 2005;Van Maanen, 1988). We used the triangulation to validate our findings by looking for congruence between the quantitative and the qualitative data as well as to aggregate the findings.…”