1. Department of Medical Genetics, Medical University of Sofia, Zdrave Street 2, 1431 Sofia, Bulgaria
2. Genomics Laboratory of Malinov Clinic, 1620 Sofia, Bulgaria
3. Vratza District Hospital, 66 “Vtori Iuni” Boulevard, 3000 Vratza, Bulgaria
4. Faculty of Medicine, University of Nis, Univerzitetski trg 2, 18000 Nis, Serbia
5. Faculty of Medicine, University of Skopje, Macedonian Academy of Sciences and Arts, Bul. Krste Misirkov 2, P.O. Box 428, 1000 Skopje, Macedonia
6. Institute of Microbiology, Bulgarian Academy of Sciences, 26 Georgi Bonchev Street, 1113 Sofia, Bulgaria
7. National Center of Public Health and Analyses, 15 Acad. Ivan Evst. Geshov Boulevard, 1431 Sofia, Bulgaria
8. Institute of Anatomy, Bern University, Baltzerstrass 2, 3012 Bern, Switzerland