“…Research-tested continuing care services range from text message affirmations and prompts, to structured phone outreach by nonprofessionals, to booster sessions in the original treatment setting (e.g., Garner, Godley, Passetti, Funk, & White, 2014; Godley et al, 2014; Godley et al, 2010). Mutual help groups, which incorporate a self-help approach within the context of reciprocal support, are facilitated by peers rather than professionals, free of charge, and open to the public (Bekkering, Mariën, Parylo, & Hannes, 2016; Winters et al, 2011). Based largely on principles of twelve-step facilitation (see Humphreys et al, 2004), mutual help groups provide peer support via shared recovery experiences within group and mentoring relationships with senior peers (sponsors) outside group (Bekkering et al, 2016; Kelly, Bergman, & Fallah-Sohy, 2018).…”