[1] ST GEORGES HOSP,SCH MED,DEPT HISTOPATHOL,LONDON SW17,ENGLAND
[2] UNIV COLL HOSP LONDON,DEPT ORAL PATHOL,LONDON WC 1,ENGLAND
[3] ST BARTHOLOMEWS HOSP,COLL MED,DEPT HAEMOPOIESIS,LONDON EC1,ENGLAND
[4] LONDON HOSP,COLL MED,DEPT ORAL PATHOL,LONDON E1 1BB,ENGLAND