The efficacy of case management with persons who have substance abuse problems: a three-level meta-analysis of outcomes
Journal of Consulting and Clinical Psychology (2014) - Comment
pubmed: 24821097  doi: 10.1037/a0036750  issn: 1939-2117  issn: 0022-006x 

Richard C. Rapp, Wim Van Den Noortgate, Eric Broekaert, Wouter Vanderplasschen