1. Gottlieb M. S., et al., N. Engl. J. Med.305, 1425 (1981).
2. Gottlieb M. S., et al., Morbid. Mortal. Wkly. Rep.30, 250 (1981).
3. Ehrenkranz N. J., et al., Morbid. Mortal. Wkly. Rep.31, 365 (1982).
4. Karon J. M., et al., Morbid. Mortal. Wkly. Rep. Recomm. Rep.41, 1 (1992).
5. Essex M., in AIDS: Papers from Science, 1982–1985, , Kulstad R., Ed. (AAAS, Washington, DC, 1986), pp. 3-7.