(untitled) - Hughs, W; Leoung, G; Kramer, F; Bozzette, S A; Safrin, S; Frame, P; Clumeck, N; Masur, H; Lancaster, D; Chan, C; Lavelle, J; Rosenstock, J; Falloon, J; Feinberg, J; LaFon, S; Rogers, M; Sattler, F (N. Engl. J. Med., 1993)