The Cedar Project WelTel mHealth intervention for HIV prevention in young Indigenous people who use illicit drugs: study protocol for a randomized controlled trial. - Jongbloed, Kate; Friedman, Anton J.; Pearce, Margo E.; Van Der Kop, Mia L.; Thomas, Vicky; Demerais, Lou; Pooyak, Sherri; Schechter, Martin T.; Lester, Richard T.; Spittal, Patricia M.; Cedar Project Partnership (Trials, 2016)