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Cooper, David A.; Gatell, Jose M.; Kroon, Susanne; Clumeck, Nathan; Millard, Judith; Goebel, Frank-Detlef; Bruun, Johan N.; Stingl, Georg; Melville, Rex L.; Gonzalez-Lahoz, Juan; Stevens, John W.; Fiddian, A. Paul; Goos, M.; Mertins, P.; Bogner, Johannes R.; Jänike, F. (1993): Zidovudine in persons with asympomatic HIV infection and CD4+ cell counts greater than 400 per cubic millimeter. In: The New England Journal of Medicine, Vol. 329, No. 5: pp. 297-303