Double-blind placebo-controlled trial of methylphenidate in the treatment of adult ADHD patients with comorbid cocaine dependence - Schubiner, H; Saules, K K; Arfken, C L; Johanson, C E; Schuster, C R; Lockhart, N; Edwards, A; Donlin, J; Pihlgren, E (Exp Clin Psychopharmacol, 2002)