Additionally, an observational study carried out in 2013 on the rural indigenous Group in BC, Canada described substantial reductions in substance cravings soon after a single ayahuasca retreat combined with counseling.books.google.com/guides?id=b_z8CAAAQBAJ&pg=PT117&lpg=PT117&dq=%22one+of+the+simple+pillars+of+the+id+of+the+Amazon+peoples%22&res