[1] JOHN RADCLIFFE HOSP,REG PUBL HLTH LAB,LEVEL 6-7,OXFORD OX3 9DU,ENGLAND
[2] UNIV OXFORD,JOHN RADCLIFFE HOSP,DEPT PATHOL & BACTERIOL,OXFORD OX3 9DU,ENGLAND
[3] UNIV OXFORD,SIR WILLIAM DUNN SCH PATHOL,OXFORD OX1 3RE,ENGLAND
[4] OXFORD POLYTECH,DEPT BIOL,MOLEC GENET SECT,OXFORD OX3 0BP,ENGLAND