"HEAL together": a randomized, hybrid type 1 effectiveness-implementation trial protocol of a peer-delivered behavioral activation intervention to improve methadone treatment retention. - Magidson JF; Bradley VD; Anane JS; Kleinman MB; Felton JW; Hines AC; Baskar R; Greenblatt AD; Dean D; Anvari MS; Fitzsimons H; Bennett ME; et al. (Frontiers in public health, 2025)