Is There a Gulf War Syndrome? Searching for Syndromes by Factor Analysis of SymptomsJAMA 227:215-222, 2591997., Haley,R.W.,et al, 1997
Therapy for Human Immunodeficiency Virus InfectionNEJM 328:1686-1695, Hirsch,M.S.&D'Aquila,R., 1993