[1] ROYAL FREE HOSP, ANTHONY NOLAN RES INST, LONDON NW3 2QG, ENGLAND
[2] ROYAL FREE HOSP, SCH MED, ACAD UNIT TRAVEL MED & VACCINES, LONDON, ENGLAND
[3] ROYAL FREE HOSP, SCH MED, DEPT PRIMARY CARE & POPULAT SCI, LONDON, ENGLAND
[4] ROYAL FREE HOSP, SCH MED, DEPT HAEMATOL, LONDON, ENGLAND