1. Department of Diabetes, Endocrinology, Nutritional Medicine and MetabolismInselspital, Bern University Hospital, University of Bern Bern Switzerland
2. School of Agricultural Sciences, Laboratory of BiometryUniversity of Thessaly Volos Greece
3. University Institute of Clinical ChemistryInselspital, Bern University Hospital, University of Bern Bern Switzerland
4. Department of Visceral Surgery and MedicineInselspital, Bern University Hospital, University of Bern Bern Switzerland
5. Department of Anaesthesiology and Pain MedicineInselspital, Bern University Hospital, University of Bern Bern Switzerland