1. Department of Endocrinology and Gastroenterology, Bispebjerg University Hospital, Copenhagen, Denmark.
2. Research Centre for Prevention and Health, The Capital Region, Denmark.
3. Department of Endocrinology, Aalborg Hospital, University of Aarhus, Aalborg, Denmark.
4. Department of Nutrition, National Food Institute, Technical University of Denmark, Søborg, Denmark.
5. Department of Gastroenterology, Slagelse Sygehus, Slagelse, Denmark.
6. Faculty of Health Science, University of Copenhagen, Copenhagen, Denmark.