Funding for this research was provided by:
Norges Forskningsråd (2011/1642)
Received: 6 March 2019
Accepted: 27 January 2020
First Online: 4 February 2020
Ethics approval and consent to participate
: All necessary patient consent and data inspection authority approvals were obtained as part of the YATEP at the Department of Addiction Treatment, Oslo University Hospital. The consent form used in YATEP covers participation in the HAT study. The study was evaluated and approved by the Norwegian Regional Committee for Medical Research Ethics and is in compliance with the Code of Ethics of the World Medical Association (Declaration of Helsinki) for conducting medical research involving human subjects and with the Uniform Requirements for Manuscripts Submitted to Biomedical Journals. RCT reporting followed the guidelines of the CONSORT statement 2010 (Consolidated Standards of Reporting Trials, Moher et al<i>. BMJ, 2010</i>). Regarding the use of horses and their welfare, the RCT study adhered to national regulations related to animal welfare (Mattilsynet—the Norwegian Food Safety Authority).
: Not applicable.
: The authors declare that they have no competing interests.