[1] ST MARYS HOSP, ALEXANDER SIMPSON LAB METAB RES, LONDON W2 1PG, ENGLAND
[2] ST THOMAS HOSP & MED SCH, SHERRINGTON SCH, PHYSIOL, LONDON SE1 7EH, ENGLAND
[3] ST THOMAS HOSP & MED SCH, DEPT BIOCHEM, LONDON SE1 7EH, ENGLAND
[4] ST GEORGES HOSP, SCH MED, DEPT MED 2, LONDON SW17 0QT, ENGLAND
[5] ERASMUS UNIV, DEPT MED, 3000 DR ROTTERDAM, NETHERLANDS