1. Cognitive executive impairment and dopaminergic deficits in de novo Parkinson's disease. Issue 14 (4th October 2014) Authors: Siepel, Françoise J.; Brønnick, Kolbjørn S.; Booij, Jan; Ravina, Bernard M.; Lebedev, Alexander V.; Pereira, Joana B.; Grüner, Renate; Aarsland, Dag Journal: Movement disorders Issue: Volume 29:Issue 14(2014) Page Start: 1802 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗