Behavioural disorders, Parkinson’s disease and subthalamic stimulation - Houeto, JL; Mesnage, V; Mallet, L; Pillon, B; Gargiulo, M; du Moncel, ST; Bonnet, AM; Pidoux, B; Dormont, D; Cornu, P; Agid, Y (J Neurol Neurosurg Psychiatry, 2002)