[1] ROYAL VICTORIA INFIRM, DEPT MED, NEWCASTLE UPON TYNE NE1 4LP, TYNE & WEAR, ENGLAND
[2] ROYAL VICTORIA INFIRM, DEPT CLIN BIOCHEM & METAB MED, NEWCASTLE UPON TYNE NE1 4LP, TYNE & WEAR, ENGLAND
[3] UNIV SOUTHAMPTON, SCH MED, SOUTHAMPTON SO9 5NH, HAMPSHIRE, ENGLAND
[4] KOMMUNEHOSP, AFDELING M, AARHUS, DENMARK