Differentiating the primary reinforcing and reinforcement-enhancing effects of varenicline.
Schassburger RL, Levin ME, Weaver MT, Palmatier MI, Caggiula AR, Donny EC, Sved AF. Differentiating the primary reinforcing and reinforcement-enhancing effects of varenicline. Psychopharmacology (Berl). 2015 Mar; 232(5):975-83.