Reisfield, MD, G.M., Webb, PhD, F.J., Bertholf, PhD, R.L., Sloan, MD, P.A. and Wilson, MD, G.R. 2007. Family physicians’ proficiency in urine drug test interpretation. Journal of Opioid Management. 3, 6 (Nov. 2007), 333–337. DOI:https://doi.org/10.5055/jom.2007.0022.