Impaired immune responses toward alloantigens and tumor cells but normal thymic selection in mice deficient in the (β2 integrin leukocyte function-associated antigen-1 - Shier, P; Otulakowski, G; Ngo, K; Panakos, J; Chourmouzis, E; Christjansen, L; Lau, C Y; Fung-Leung, W P (J.Immunol, 1996)