[1] UNIV BRISTOL,DEPT MED,BRISTOL BS2 8HW,AVON,ENGLAND
[2] UNIV MANCHESTER,DEPT CHILD HLTH,MANCHESTER,LANCS,ENGLAND
[3] FAC MED NECKER ENFANTS MALAD,INSERM,U344,PARIS,FRANCE
[4] UNIV LONDON KINGS COLL,SCH MED & DENT,DEPT CLIN BIOCHEM,LONDON WC2R 2LS,ENGLAND
[5] UNIV LONDON KINGS COLL,SCH MED & DENT,DEPT MOL MED,LONDON WC2R 2LS,ENGLAND
[6] UNIV LONDON KINGS COLL,SCH MED & DENT,DEPT CHILD HLTH,LONDON WC2R 2LS,ENGLAND
[7] UNIV SHEFFIELD,CTR CLIN SCI,DEPT MED,SHEFFIELD S10 2TN,S YORKSHIRE,ENGLAND