1. Department of Radiology and Nuclear Medicine; Radboud University Medical Center; Nijmegen the Netherlands
2. Laboratory of Functional and Molecular Imaging; National Institute of Neurological Disorders and Stroke, National Institutes of Health; Bethesda MD USA
3. MRS Core Facility; National Institute of Mental Health, National Institutes of Health; Bethesda MD USA
4. Erwin L. Hahn Institute for Magnetic Resonance Imaging; University Duisburg-Essen; Essen Germany