1. Center for Hyperpolarization in Magnetic Resonance, Department of Health Technology, Technical University of Denmark, Building 349, 2800 Kongens Lyngby, Denmark
2. Paul Scherrer Institute, CH-5232 Villigen, Switzerland
3. National High Magnetic Field Laboratory, UF, AMRIS, Gainesville, Florida 32611, United States
4. GE Healthcare, Park Alle 295, 2605 Brøndby, Denmark