“…ADHD has been found to be associated with an earlier onset of SUD (Horner & Scheibe, 1997). It is generally assumed that untreated ADHD is a risk factor for SUD development (Biederman, Wilens, Mick, Faraone, & Spenser, 1998;Biederman et al, 1997;Mannuzza et al, 1989Mannuzza et al, , 1998Trudeau, 2005aTrudeau, , 2005b.…”