Dopamine Reduction in the Substantia Nigra of Parkinson's Disease Patients Confirmed by In Vivo Magnetic Resonance Spectroscopic Imaging Gröger, Adriane ; Kolb, Rupert ; Schäfer, Rita ; Klose, Uwe Abstract Publication: PLoS ONE Pub Date: January 2014 DOI: 10.1371/journal.pone.0084081 Bibcode: 2014PLoSO...984081G