1. Obesity Research UnitResearch Programs UnitDiabetes and Obesity Research ProgramUniversity of Helsinki 00014 Helsinki Finland
2. Transplantation LaboratoryFaculty of MedicineUniversity of Helsinki 00014 Helsinki Finland
3. HUSLABHelsinki University Hospital 00029 Helsinki Finland
4. Science for Life LaboratoryKTH‐Royal Institute of Technology 17121 Stockholm Sweden
5. Department of Biology and Biological EngineeringChalmers University of Technology 41296 Gothenburg Sweden
6. Centre for Host–Microbiome InteractionsDental InstituteKing's College London SE19RT London UK
7. Department of Public HealthFinnish Twin Cohort StudyUniversity of Helsinki 00014 Helsinki Finland
8. Institute for Molecular Medicine FinlandFIMMUniversity of Helsinki 00014 Helsinki Finland
9. Abdominal CenterEndocrinologyHelsinki University Central Hospital and University of Helsinki 00014 Helsinki Finland