[1] UNIV OXFORD,JOHN RADCLIFFE HOSP,DEPT PAEDIAT,OXFORD OX3 9DU,ENGLAND
[2] UNIV OXFORD,DEPT COMMUNITY MED,OXFORD OX3 9DU,ENGLAND
[3] RADCLIFFE INFIRM,DEPT COMMUNITY HLTH,OXFORD OX2 6HE,ENGLAND
[4] OXFORD POLYTECH,DEPT COMP & MATH SCI,OXFORD OX3 0BP,ENGLAND