[1] AMTSSYGEHUSET,DEPT MED 3,AARHUS,DENMARK
[2] AARHUS UNIV,INST EXPTL CLIN RES,DK-8000 AARHUS C,DENMARK
[3] HERLEV HOSP,DEPT INTERNAL MED & ENDOCRINOL,DK-2730 HERLEV,DENMARK
[4] ROYAL VICTORIA INFIRM,DEPT CLIN BIOCHEM & METAB MED,NEWCASTLE TYNE NE1 4LP,TYNE & WEAR,ENGLAND