[1] UNIV HOSP S MANCHESTER,MANCHESTER M20 8LR,ENGLAND
[2] MRC,PNEUMOCONIOSIS UNIT,PENARTH,WALES
[3] ST THOMAS HOSP & MED SCH,LONDON SE1 7EH,ENGLAND
[4] ROYAL S HANTS HOSP,SOUTHAMPTON SO9 4PE,ENGLAND
[5] UNIV LONDON LONDON SCH HYG & TROP MED,LONDON WC1E 7HT,ENGLAND
[6] CITY GEN HOSP,STOKE ON TRENT,ENGLAND
[7] COMMUNICABLE DIS SURVEILLANCE CTR,COLINDALE,ENGLAND
[8] WESSEX REG HLTH AUTHOR,WINCHESTER,ENGLAND
[9] UNIV EDINBURGH,EDINBURGH EH8 9YL,MIDLOTHIAN,SCOTLAND
[10] INST PSYCHIAT,LONDON SE5 8AF,ENGLAND