Affiliation: | a AIDS Research Group-IDIBAPS-HIVACAT, Spain b Services of Infectious Diseases & AIDS Unit, Spain c Microbiology of the Hospital Clinic Barcelona University of Barcelona, Spain d Immunology of the Hospital Clinic Barcelona University of Barcelona, Spain e Institut de Recerca de la SIDA IrsiCaixa-HIVACAT, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain f Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain g AIDS and Cancer Virus Program, SAIC-Frederick, Inc., NCI-Frederick, Frederick, MD 21702, USA |