1. Hood, L., Steinmetz, M. & Malissen, B.A. Rev. Immun, l, 529–568 (1983).
2. Mach, B., Scand, J. Immun. 20, 473–478 (1984).
3. Griscelli, C. et al. in Progress in Immunodeficiency Research and Therapy Vol. 1 (eds Griscelli, C. & Voosen, J.) 19–26 (Excerpta Medica, Amsterdam, 1984).
4. Lisowska-Grospierre, B. et al. J clin. Invest. (in the press).
5. Wake, C.T. et al. Proc. natn. Acad. Sci. U.S.A. 79, 6979–6983 (1982).