Tryptophan depletion impairs stimulus-reward learning while methylphenidate disrupts attentional control in healthy young adults: implications for the monoaminergic basis of impuls... by Rogers, R, Blackshaw, A, Middleton, H, Matthews, K, Hawtin, K, Crowley, C, Hopwood, A, Wallace, C, Deakin, J, Sahakian, B, Robbins, T

Dissociable deficits in the decision-making cognition of chronic amphetamine abusers, opiate abusers, patients with focal damage to prefrontal cortex, and tryptophan-depleted norma... by Rogers, R, Everitt, B, Baldacchino, A, Blackshaw, A, Swainson, R, Wynne, K, Baker, N, Hunter, J, Carthy, T, Booker, E, London, M, Deakin, J, Sahakian, B, Robbins, T