[1] UNIV UTRECHT, EIJKMAN WINKLER INST, DEPT VIROL, UTRECHT, NETHERLANDS
[2] UNIV NEW S WALES, HIV MED UNIT, ST VINCENTS HOSP, SYDNEY, NSW, AUSTRALIA
[3] NATL FDN BIOMED RES, BETHESDA, MD USA
[4] CHELSEA & WESTMINSTER HOSP, DEPT HIV GUM, LONDON, ENGLAND
[5] UNIV AMSTERDAM, ACAD MED CTR, NATL AIDS THERAPY EVALUAT CTR, DEPT INFECT DIS TROP MED & AIDS, NL-1105 AZ AMSTERDAM, NETHERLANDS
[6] UNIV BRITISH COLUMBIA, ST PAULS HOSP, BRITISH COLUMBIA CTR EXCELLENCE HIV AIDS, VANCOUVER, BC V5Z 1M9, CANADA
[7] UNIV CALIF SAN DIEGO, DEPT PATHOL, LA JOLLA, CA 92093 USA
[8] UNIV CALIF SAN DIEGO, DEPT MED, LA JOLLA, CA 92093 USA
[9] UNIV CALIF SAN DIEGO, SAN DIEGO VET AFFAIRS MED CTR, LA JOLLA, CA 92093 USA
[10] UNIV LONDON, ST MARYS HOSP, DEPT MED, LONDON, ENGLAND