[1] UNIV COLL & MIDDLESEX SCH MED,ACAD DEPT GENITO URINARY MED,JAMES PRINGLE HOUSE,LONDON W1N 8AA,ENGLAND
[2] UNIV COLL & MIDDLESEX SCH MED,DEPT MED MICROBIOL,VIROL SECT,LONDON W1N 8AA,ENGLAND
[3] GEN INFIRM,DEPT GENITOURINARY MED,LEEDS LS1 3EX,W YORKSHIRE,ENGLAND
[4] PUBL HLTH LAB SERV,DEPT VIROL,LEEDS,ENGLAND