title: The Leiden "class IV" or "class I-like" workshop November 20-23, 1986.
mesh_terms: D003201:Computers; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D006680:HLA Antigens / Q000276:immunology; D006801:Humans; D008213:Lymphocyte Activation; D009626:Terminology as Topic
chemical_list: D000939:Epitopes; D006680:HLA Antigens