[1] UNIV LONDON UNIV COLL,SCH MED,RAYNE INST,DEPT HUMAN METAB,LONDON WC1E 6BT,ENGLAND
[2] CLIN RES CTR,HARROW HA1 3UJ,MIDDLESEX,ENGLAND
[3] UNIV LONDON LONDON SCH HYG & TROP MED,DEPT HUMAN NUTR,LONDON WC1E 7HT,ENGLAND
[4] WASHINGTON UNIV,SCH MED,DEPT MED,ST LOUIS,MO 63130