[...] the weekly medical counselling that all patients received was both more frequent and perhaps of higher quality than they might receive in the community; it was delivered more often than is typically done, and the study physicians were carefully chosen because of their deep interest in the treatment of opioid dependence. [...] he adds, "many such patients don't want to stop using opioids, but just want to reduce their dose.
Holmes, D. (2012). Prescription drug addiction: The treatment challenge. The Lancet, 379(9810), 17–18. https://doi.org/10.1016/S0140-6736(12)60007-5