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Cooper, David A. and Gatell, Jose M. and Kroon, Susanne and Clumeck, Nathan and Millard, Judith and Goebel, Frank-Detlef and Bruun, Johan N. and Stingl, Georg and Melville, Rex L. and Gonzalez-Lahoz, Juan and Stevens, John W. and Fiddian, A. Paul and Goos, M. and Mertins, P. and Bogner, Johannes R. and 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