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Article History

Received: 13 March 2017

Accepted: 11 July 2017

First Online: 10 August 2017

Ethics approval and consent to participate

: Participation was voluntary. The study received approval from the Chestnut Health Systems’ Institutional Review Board (IRB Study No. 1091-0114) and is registered at Clinical Trials.gov (NCT02132481). Chestnut’s IRB acted as a Centralized Ethics Committee for the two substance use treatment agencies from which participants were recruited. The study complies with the relevant Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) and World Health Organization (WHO) Checklist (see Additional file).

: Informed written consent was received for publication of the manuscript and figures. The Consent Form is held by the authors and their institution and is available for review by the Editor-in-Chief.

: Author Dr. Gustafson has a shareholder interest in CHESS Mobile Health, a small business that develops web-based health care technology for patients and family members. This relationship is extensively managed by the authors and the University of Wisconsin. All other authors declare that they have no competing interests.

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