Attentional Set-Shifting Deficit in Parkinson's Disease Is Associated with Prefrontal Dysfunction: An FDG-PET Study Sawada, Yoichi ; Nishio, Yoshiyuki ; Suzuki, Kyoko ; Hirayama, Kazumi ; Takeda, Atsushi ; Hosokai, Yoshiyuki ; Ishioka, Toshiyuki ; Itoyama, Yasuto ; Takahashi, Shoki ; Fukuda, Hiroshi ; Mori, Etsuro Abstract Publication: PLoS ONE Pub Date: June 2012 DOI: 10.1371/journal.pone.0038498 Bibcode: 2012PLoSO...738498S