European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology|September 11, 1999
Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology : Official Publication of the International Retrovirology Association|December 22, 1998
European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology|September 11, 1999
Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology : Official Publication of the International Retrovirology Association|December 22, 1998