title: Positive and negative selection in the thymus and the thymic paradox.
authors.affiliation: Department of Immunology, Imperial College School of Medicine, Hammersmith Hospital, London.
authors.forename: J N
authors.initials: JN
authors.lastname: Reza
authors.forename: M A
authors.initials: MA
authors.lastname: Ritter
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D008213:Lymphocyte Activation; D008285:Major Histocompatibility Complex; D018448:Models, Immunological; D011948:Receptors, Antigen, T-Cell; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology*
chemical_list: D011948:Receptors, Antigen, T-Cell