1. Xlab, Centre for Healthy Aging, Department of Biomedical Sciences University of Copenhagen Copenhagen Denmark
2. Clinical Research Centre Medical University of Bialystok Bialystok Poland
3. Gastrounit, Medical Division Copenhagen University Hospital Hvidovre Hvidovre Denmark
4. Gastrounit, Surgical Division Copenhagen University Hospital Hvidovre Hvidovre Denmark
5. Department of Geriatrics Bispebjerg University Hospital Copenhagen Denmark