• Archard, L.C., Bowles, N.E., Behan, P.O., Bell, E.J. & Doyle, D. (1988) Postviral fatigue syndrome: persistence of enterovirus RNA in muscle and elevated creatinine kinase. J. R. Sac. Med. 81, 326.
  • Arnold, D.L., Radda, G.K., Bore, P.J., Styles, P. & Taylor, D.J. (1984) Excessive intrucellular acidosis of skeletal muscle on exercise in a patient with postviral exhaustion/fatigue syndrome. Lancet, 1, 1367.
  • Behan, P.O. & Behan, W.M.H. (1988) Postviral fatigue syndrome. CRC Crit. Rev. Neurobiol. 4, 157.
  • Behan, P.O., Behan, W.M.H. & Bell, E.J. (1985) The postviral fatigue syndrome—an analysis of the findings in 50 cases. J. Infect. 10, 211.
  • Bukowski, J.F., Biron, C.A. & Welsh, R.M. (1983) Natural cell-mediated cytotoxicity, plasma interferon and tumor cell rejection in mice persistently infected with lymphocyte choriomeningitis virus. J. Immunol. 131, 991.
  • Caligiuri, M., Murray, C., Buchwald, D., Levine, H., Cheney, P., Peterson, D., Komaroff, A.L. & Ritz, J. (1987) Phenotypic and functional deficiency of natural killer cells in patients with chronic fatigue syndrome. J. Immunol. 139, 3306.
  • Caligiuri, M.A., Zmuidzinas, A., Manley, T.J., Levine, H., Smith, K., A. & Ritz, J. (1990) Functional consequences of interleukin-2 receptor expression on resting human lymphocytes. J. exp. Med. 171, 1509.
  • Ennis, F.A., Beare, A.S., Riley, D., Schild, G.C., Meager, A., Qui, Y.H., Schwarz, G. & Rook, A.H. (1981) Interferon induction and increased natural killer cell activity in influenza infections in man. Lancet. ii, 891.
  • Griffin, J.D., Hercend, T., Beveridge, R.P. & Schlossman, S.F. (1983) Characterization of an antigen expressed by human natural killer cells. J. Immunol. 130, 2947.
  • Hamilton, T., Wada, H.G. & Sussman, H.H. (1979) Identification of transferrin receptors on the surface of human cultured cells. Proc. natl Acad. Sci. USA, 76, 6406.
  • Hercend, T., Griffin, J.D., Bensussan, A., Schmidt, R.E., Edson, M.A., Brennan, A., Murray, C, Daley, J.F., Schlossman, S.F. & Ritz, J. (1985) Generation of monoclonal antibodies to a human NK clone, characterization of two NK associated antigens NKH lA and NKH 2 expressed on a subset of large granular lymphocytes. J. clin. Invest. 75, 932.
  • Jamal, G.A. & Hansen, S. (1989) Poslviral fatigue syndrome: evidence for underlying organic disturbance in the muscle fibre. Eur. Seurol. 29, 272.
  • Lanier, L.L., Le, A.M., Civin, C.I., Loken, M.R. & Phillips, J.H. (1986); The relationship of CD16 (Leu 11) and Leu 19 (NKH-1) antigen expression on human peripheral blood NK cells and cytotoxic T lymphocytes. J. Immunol. 136, 4480.
  • Lanier, L.L., Le, A.M., Phillips, J.H., Warner, N.L. & Bablock, G.F. (1983) Subpopulations of human natural killer cells defined by expression of the Lcu-7 (NKH-1) and Leu-11 (NK-15) antigens. J. Immunol. 131, 1789.
  • Larrick, J.W. Cresswell, P. (1979) Modulation of cell surface iron transferrin receptors by cellular density and state of activation. J. Supramol. Struct. 11, 579.
  • Miller, N.A., Carmichael, H.A., Calder, B.D., Behan, P.O., Bell, E.J., McCartney, R.A. & Hall, F.C. (1991) Coxsackie B serology does not help diagnose postviral fatigue syndrome. Br. med. J. (In press).
  • Perrin, L.H., Tishon, A. & Oldstone, M.B.A. (1977) Immunological injury in measles virus infection. III. Presence and characterization of human cytotoxic lymphocytes. J. Immunol. 118, 282.
  • Perussia, B., Trinchieri, C. Jackson, A., Warner, N.L., Faust, J., Rumpold, H., Kraft, D. & Lamer, L.L. (1984) The Fc receptor for IgG on human natural killer cells: phenotypic, functional and comparative studies with monoclonal antibodies. J. Immunol. 133, 180.
  • Shindelman, J.E., Ortmeyer, A.E. & Sussman, H.H. (1981) Demonstration of the transferrin receptor in human breast cancer tissue. Potential marker for identifying dividing cells. Int. J. Cancer, 27, 329.
  • Straus, S.E., Tosato, G., Armstrong, G., Lawley, T., Preble, O.T., Henle, W., Davey, R., Pearson, G., Epstein, J., Brus, I. & Blaese, R.M. (1985) Persisting illness and fatigue in adults with evidence of Epstein-Barr vims infection. Ann. intern. Med. 102, 7.
  • Welsh, R.M. (1981) Natural cell mediated immunity during virus infection. In Natural Resistance to Tumours and Viruses (ed. by O.Haller) p. 83. Springer-Verlag. Berlin .
  • Yousef, G.E., Mann, G.F., Smith, D.G., Bell, E.J., Murugesan, V. & Mccartney, R.A. (1988) Chronic cntcrovirus infection in patients with postviral fatigue syndrome. Lancet, i, 146.