1. Center for Magnetic Resonance Research; Department of Radiology; University of Minnesota; Minneapolis Minnesota USA
2. Division of Biostatistics; School of Public Health, University of Minnesota; Minneapolis Minnesota USA
3. Division of Endocrinology and Diabetes; Department of Medicine; University of Minnesota; Minneapolis Minnesota USA
4. Multimodal and Functional Neuroimaging Research Group; Central European Institute of Technology, Masaryk University; Brno Czech Republic