A novel measure of assessing the frequency and route of administration of various substances of abuse. (1st January 2015) - Ninnemann, Andrew; Elmquist, Joanna; Febres, Jeniimarie; Brasfield, Heather; Shorey, Ryan C.; Zapor, Heather; Wolford-Celvenger, Caitlin; MacPherson, L.; Stuart, Gregory L.