1. Aarstad, H.J., Gaudernack, G. and Seljelid, R. Stress causes reduced natural killer activity in mice, Scand. J. Immunol., 18 (1983) 461–464.
2. Abbas, A.K., Perez, V.L., van Parijs, L. and Wong, R.C. Differentiation and tolerance of CD4+ T lymphocytes, Ciba Found. Symp., 195 (1995) 7–13.
3. Abo, T., Kawate, T., Itoh, K. and Kimagai, K. Studies on the bioperiodicity of the immune response I. Circadian rhythms of human T.B. and K cell traffic in the peripheral blood, J. Immunol., 126 (1981) 1360–1363.
4. Aebischer, F. and Schlegel-Hauter, S.E. Glucocorticoids modulate the induction of BLTE/granzyme A activity in the murine T cell hybridomaa PC60, Immunopharmacology, 23 (1992) 181–190.
5. Allan, W., Tabi, Z., Cleary, A. and Doherty, P.C. Cellular events in the lymph node and lung of mice with influenza, J. Immunol., 144 (1990) 3980–3986.