title: The identity of the cells that positively select thymocytes.
authors.affiliation: Section of Transplantation Biology, Clinical Research Centre, Harrow, Middx., U.K.
authors.forename: J I
authors.initials: JI
authors.lastname: Elliott
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation / Q000502:physiology; D017690:Cell Transplantation / Q000502:physiology; D004847:Epithelial Cells; D007108:Immune Tolerance / Q000502:physiology; D051379:Mice; D008819:Mice, Nude; D013601:T-Lymphocytes / Q000502:physiology*; D013950:Thymus Gland / Q000166:cytology* / Q000187:drug effects; D018183:Transplantation Chimera