Dopaminergic modulation of striato-frontal connectivity during motor timing in Parkinson's disease. - Jahanshahi M; Jones CR; Zijlmans J; Katzenschlager R; Lee L; Quinn N; Frith CD; Lees AJ; Jahanshahi, Marjan; Jones, Catherine R G; Zijlmans, Jan; Katzenschlager, Regina; et al. (Brain: A Journal of Neurology, 2010)