Walker, L S Co-stimulation and selection for T-cell help for germinal centres: the role of CD28 and OX40. [electronic resource] - Immunology today Jul 2000 - 333-7 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Review ISSN: 0167-5699 Standard No.: 10.1016/s0167-5699(00)01636-4 doi Subjects--Topical Terms: AnimalsCD28 Antigens--immunologyCD4-Positive T-Lymphocytes--immunologyCell Adhesion--immunologyCell Movement--immunologyGerminal Center--immunologyHumansReceptors, OX40Receptors, Tumor Necrosis FactorTumor Necrosis Factor Receptor Superfamily, Member 7--immunology