1. ETH Zurich Zurich Switzerland
2. Department of Diabetes, Endocrinology, Nutritional Medicine and Metabolism, Inselspital Bern University Hospital, University of Bern Bern Switzerland
3. Institute of Biological Chemistry, Biophysics and Bioengineering Heriot‐Watt University Edinburgh UK
4. Laboratory of Biometry, School of Agriculture University of Thessaly Nea Ionia Greece
5. University Institute of Clinical Chemistry, Inselspital, University Hospital Bern Bern Switzerland
6. Wellcome Trust–MRC Institute of Metabolic Science University of Cambridge Cambridge UK
7. Department of Paediatrics University of Cambridge Cambridge UK