| Authors: |
Yancheva N; Department for AIDS, Specialized Hospital for Infectious and Parasitic Diseases, Medical University, Sofia, Bulgaria., Strashimirov D; Department for AIDS, Specialized Hospital for Infectious and Parasitic Diseases, Medical University, Sofia, Bulgaria., Hrischev V; National Specialized Hospital for Active Treatment of Hematological Diseases, Sofia, Bulgaria., Tchervenyakova T; Department for AIDS, Specialized Hospital for Infectious and Parasitic Diseases, Medical University, Sofia, Bulgaria., Nikolova M; National Reference Laboratory of Immunology, National Institute of Infectious and Parasitic Diseases, Sofia, Bulgaria., Aleksiev I; Confirmatory National Laboratory of HIV, National Institute of Infectious and Parasitic Diseases, Sofia, Bulgaria. |
