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https://elifesciences.org/articles/03604v1 Structural basis of nucleoside and nucleoside drug selectivity by concentrative nucleoside... drug selectivity structural basis nucleoside https://www.erowid.org/references/refs_view.php?ID=332 Erowid.org: Erowid Reference 332 : Increasing the selectivity of drug discrimination procedures :... The Index page for the reference article: Appel JB, West WB, Rolandi WG, Alici T, Pechersky K Increasing the selectivity of drug discrimination procedures... erowid org drug discrimination reference 332 increasing