Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Colledge, Flora; Vogel, Marc; Dürsteler-Macfarland, Kenneth; Strom, Jonas; Schoen, Susanne; Pühse, Uwe; Gerber, Markus (2017). A pilot randomized trial of exercise as adjunct therapy in a heroin-assisted treatment setting. Journal of Substance Abuse Treatment, 76:49-57.