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. 2020 Jan 6;271(5):847–856. doi: 10.1007/s00406-019-01091-0

Fig. 1.

Fig. 1

Mean serum buprenorphine of the cannabis group (N = 15), dose-related buprenorphine concentrations, serum norbuprenorphine concentrations and metabolite-to-parent drug ratios per years of measuring (error bars denote 95% confidence intervals)