University Hospital "St.Ivan Rilski";
Department of Clinical Laboratory and Clinical Immunology;
Medical University of Sofia;
1431 Sofia;
Bulgaria;
Ob/Gyn Hospital "Dr Shterev";
1330 Sofia;
Bulgaria;
University Hospital "St. Ivan Rilski";
Department of Clinical Laboratory and Clinical Immunology;
Medical University of Sofia;
1431 Sofia;
Bulgaria;
Laboratory of Molecular Immunology;
Institute of Biology and Immunology of Reproduction;
Bulgarian Academy of Sciences;
1113 Sofia;
Bulgaria;
Tissue Bank "BulGen";
1330 Sofia;
Bulgaria;