1. 1Wallenberg Laboratory and Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, S-413 45 Gothenburg, Sweden
2. 2Region Västra Götaland, Sahlgrenska University Hospital, Department of Medicine, Gothenburg, Sweden
3. 3Department of Pediatrics, University of Groningen, University Medical Center Groningen, The Netherlands
4. 4Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
5. 5European Research Institute for the Biology of Ageing (ERIBA), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
6. 6Region Västra Götaland, Sahlgrenska University Hospital, Department of Clinical Physiology, Gothenburg, Sweden
7. 7Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health Sciences, University of Copenhagen, Copenhagen, DK-2200, Denmark