“…Since studies on research recruitment of women with SUD were limited, the search was broadened to include research recruitment of people who use drugs (PWUD). Ten studies were relevant; seven in international settings (Boucher et al, 2017;Brown et al, 2019;Grové, 2019;MacVicar, Humphrey, & Forbes-McKay, 2018;Sirdifield, Owens, & Brooker, 2016;Thong, Ulph, Barrowclough, & Gregg, 2019;Thornton, Harris, Baker, Johnson, & Kay-Lambkin, 2016) and three in the United States (Ballard, Cooper, & Young, 2019;Batista et al, 2016;Ryan, Smeltzer, & Sharts-Hopko, 2019). The literature emphasized individual factors as prominent challenges regarding research recruitment of women with SUD and PWUD.…”