1. Department of Medicine II, Saarland University Medical Center Saarland University Homburg Germany
2. Laboratory of Metabolic Liver Diseases, Department of General, Transplant and Liver Surgery Medical University of Warsaw Warsaw Poland
3. Department of Gastroenterology, Hepatology, Nutritional Disorders and Pediatrics The Children’s Memorial Health Institute Warsaw Poland
4. Department of Internal Medicine and Cardiology Medical University of Warsaw Warsaw Poland
5. Department of Pediatrics, Gastroenterology, Hepatology, Nutrition and Allergology Medical University of Bialystok Bialystok Poland
6. Department of Pediatrics Silesian Medical Academy Katowice Poland
7. Department of Transplantation Medicine and Nephrology Medical University of Warsaw Warsaw Poland
8. Public Health Department of the Children’s Memorial Health Institute Warsaw Poland
9. Institute of Clinical Chemistry and Clinical Pharmacology University Hospital Bonn Bonn Germany
10. Hannover Health Science Campus Hannover Medical School (MHH) Hannover Germany