1. Department of Anesthesiology and Intensive Care, University Hospital Lozenetz, 1 Kozyak Str., 1407 Sofia, Bulgaria
2. Medical Faculty, Sofia University, St. Kliment Ohridski, Kozyak 1 Str., 1407 Sofia, Bulgaria
3. Medical Faculty, Medical University of Sofia, 1 Georgi Sofiiski Str., 1431 Sofia, Bulgaria
4. Department of Diagnostic Imaging, Medical University Plovdiv, Bul. Vasil Aprilov 15A, 4000 Plovdiv, Bulgaria
5. Department of Gastroenterology, University Hospital Lozenetz, 1407 Sofia, Bulgaria
6. Clinic of Endocrinology and Metabolic Disorders, UMHAT “Sv. Georgi”, 4000 Plovdiv, Bulgaria
7. Laboratory of Hematopathology and Immunology, National Specialized Hospital for Active Treatment of Hematological Diseases, “Plovdivsko Pole“ Str., 6, 1756 Sofia, Bulgaria
8. Department of Genetics, Faculty of Biology, Sofia University “St. Kliment Ohridski”, 8 Dragan Tzankov Str., 1164 Sofia, Bulgaria
9. Department of Informatics, New Bulgarian University, Montevideo 21 Str., 1618 Sofia, Bulgaria
10. Pediatric Clinic, University Hospital “N. I. Pirogov,” 21 “General Eduard I. Totleben” Blvd; 1606 Sofia, Bulgaria
11. Department of Healthcare, Faculty of Public Health “Prof. Tsekomir Vodenicharov, MD, DSc”, Medical University of Sofia, Bialo More 8 Str., 1527 Sofia, Bulgaria
12. Department of General and Clinical Pathology, Medical University of Plovdiv, Bul. Vasil Aprilov 15A, 4000 Plovdiv, Bulgaria