“…In addition, the references of included studies and a number of relevant reviews were screened (i.e., Cavaiola, Schiff, & Kane- Cavaiola, 1990;Deas & Thomas, 2001;Elliott, Orr, Watson, & Jackson, 2005;Passetti, Godley, & Godley, 2012;Passetti & White, 2007;Williams & Chang, 2000;Winters, Botzet, & Fahnhorst, 2011). A list with studies on Narcotics Anonymous found on the Internet was also screened (White, Budnick, & Pickard, 2011).…”