[1] ROYAL FREE HOSP,DEPT MICROBIOL,LONDON NW3 1QG,ENGLAND
[2] STOBHILL GEN HOSP,DIV GEN MED UNIT B,GLASGOW G21 3UW,SCOTLAND
[3] UNIV GLASGOW,STOBHILL GEN HOSP,DEPT PATHOL INFECT DIS,GLASGOW G21 3UW,SCOTLAND
[4] WESTERN INFIRM & ASSOCIATED HOSP,GLASGOW G11 6NT,SCOTLAND