1. Department of Digestion, Metabolism and Reproduction, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, United Kingdom
2. NiCE-MSI, National Physical Laboratory (NPL), Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom
3. Waters Corporation, Altrincham Road, Wilmslow SK9 4AX, United Kingdom
4. Department of Surgery & Cancer, Metabolism and Reproduction, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, Unite Kingdom
5. Neurometabolic Unit, Department of Neurology, Hospital Sant Joan de Déu, 08950 Barcelona, Spain
6. Neurophysiology Laboratory, Department of Biomedicine, Faculty of Medicine and Health Sciences, Institute of Neurosciences, University of Barcelona, Barcelona 08036, Spain
7. Biological Mass Spectrometry, Rosalind Franklin Institute, Harwell Campus, Didcot OX11 0QS, United Kingdom