[1] Med Univ Sofia, Dept Med Genet, Sofia, Bulgaria
[2] Sofia Univ St Kliment Ohridski, Dept Genet, Fac Biol, Sofia, Bulgaria
[3] Gynecol & assisted Reprod Hosp Malinov, Sofia, Bulgaria
[4] Ss Cyril & Methodius Univ, Fac Nat Sci & Math, Mol Biol Lab, Skopje, North Macedonia
[5] Med Univ Sofia, Dept Neurol, UH Alexandrovska, Sofia, Bulgaria