[1] UNIV SHEFFIELD,UNIV SUBDEPT MED GENET,SHEFFIELD S10 5DN,ENGLAND
[2] ST JAMES UNIV HOSP,DEPT PAEDIAT,LEEDS LS9 7TF,W YORKSHIRE,ENGLAND
[3] UNIV NOTTINGHAM,SCH MED,DEPT BIOCHEM,NOTTINGHAM NG7 2UH,ENGLAND
[4] CHILDRENS HOSP,DEPT CHEM PATHOL,SHEFFIELD S10 2TH,S YORKSHIRE,ENGLAND