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Distribution of T (CD7+) and B cells (CD19+) in frozen sections from human control lymph node, tonsil and reactive lymph node to head and neck carcinoma. Sections were stained with anti-CD7- PE and anti-CD19-FITC monoclonal antibodies and with 7 AAD and analyzed by confocal microscopy. F: primary follicle; GC: germinal center; M: mantle of B cells; C: centrogerminal layer of T cells.
