1. Centre for Hyperpolarisation in Magnetic Resonance Department of Chemistry University of York Heslington YO10 5NY United Kingdom
2. MR Neuroimaging agents Max Planck Institute for Biological Cybernetics Tübingen 72076 Germany
3. Centro de Investigacións Científicas Avanzadas (CICA) Departamento de Química Facultade de Ciencias Universidade da Coruña A Coruña 15001 Spain
4. Laboratory of Molecular and Cellular Neuroimaging International Center for Primate Brain Research (ICPBR) Center for Excellence in Brain Science and Intelligence Technology (CEBSIT) Chinese Academy of Sciences (CAS) Shanghai 200031 PR China