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The trial publications, including results, are listed below:

The I-WOTCH clinical results are reported in this journal paper:

Sandhu HK, Booth K, Furlan AD, et al. Reducing Opioid Use for Chronic Pain With a Group-Based Intervention: A Randomized Clinical Trial. JAMA. 2023;329(20):1745–1756. doi:10.1001/jama.2023.6454

Process Evaluation Results:
Nichols VP, Abraham C, Eldabe S On behalf of the I-WOTCH team, et al. ‘It was a joint plan we worked out together’. How the I-WOTCH programme enabled people with chronic non-malignant pain to taper their opioids: a process evaluation

Sandhu HK, Shaw J, Carnes D On behalf of the I-WOTCH Team, et. al.
Development and testing of an opioid tapering self-management intervention for chronic pain: I-WOTCH