- Heterozygosity for a defective gene for CC chemokine receptor 5 is not the sole determinant for the immunologic and virologic phenotype of HIV-infected long-term nonprogressors. Cohen, O.J., Vaccarezza, M., Lam, G.K., Baird, B.F., Wildt, K., Murphy, P.M., Zimmerman, P.A., Nutman, T.B., Fox, C.H., Hoover, S., Adelsberger, J., Baseler, M., Arthos, J., Davey, R.T., Dewar, R.L., Metcalf, J., Schwartzentruber, D.J., Orenstein, J.M., Buchbinder, S., Saah, A.J., Detels, R., Phair, J., Rinaldo, C., Margolick, J.B., Pantaleo, G., Fauci, A.S. J. Clin. Invest. (1997)