[1] Natl Specialised Hosp Act Treatment Hematol Dis, Lab Hematopathol & Immunol, Sofia, Bulgaria
[2] Natl Specialised Hosp Act Treatment Hematol Dis, Hematol Clin, Sofia, Bulgaria
[3] Natl Specialised Hosp Act Treatment Hematol Dis, Lab Cytogenet & Mol Biol, Sofia, Bulgaria