1. Diabetes Centre, Institute for Clinical and Experimental Medicine, 14021 Prague, Czech Republic
2. First Faculty of Medicine, Charles University, 14021 Prague, Czech Republic
3. Diabetes Center, Tameside and Glossop Integrated Care NHS Foundation Trust, Ashton-under-Lyne OL6 9RW, UK
4. Department of Endocrinology and Gastroenterology, University of Manchester, Manchester M13 9PL, UK