Institution: | Central Laboratory of Clinical Immunology, University Hospital 'Alexandrovska', Sofia, Bulgaria; ZMF, University of Tübingen, Tübingen, Germany; Fundeni Clinical Institute Centre for Immunogenetics and Virology, Bucharest, Romania; Department of Clinical Immunology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Wroclaw, Poland; Medical Biology Department, Istanbul Medical Faculty, Istanbul, Turkey |