[1] UNIV ROCHESTER,SCH MED,ROCHESTER,NY
[2] BROMPTON HOSP,CARDIOTHORAC UNIT,LONDON,ENGLAND
[3] UNIV HOSP UPPSALA,DEPT PAEDIAT,UPPSALA,SWEDEN
[4] UNIGATE FOODS LTD,GUIDFORD,SURREY,ENGLAND
[5] UNIV LONDON,THOMAS CORAM RES UNIT,LONDON,ENGLAND
[6] INST PSYCHIAT,DEPT CHILD PSYCHIAT,LONDON,ENGLAND
[7] UNIV LEEDS,DEPT PAEDIAT & CHILD HLTH,LEEDS,ENGLAND
[8] BRITISH PAEDIAT ASSOC,LONDON,ENGLAND
[9] SOPHIA CHILDRENS HOSP,NEONATAL UNIT,ROTTERDAM,NETHERLANDS
[10] ENVIRONM HLTH DIRECTORATE CANADA,OTTAWA,ONTARIO,CANADA
[11] KINGS COLL HOSP,MED SCH,DENMARK HILL,LONDON,ENGLAND
[12] OFF POPULATION CENSUSES & SURVEYS,LONDON,ENGLAND
[13] ROY HOSP SICK CHILDREN,YORKHILL,GLASGOW,SCOTLAND
[14] CITY HOSP NOTTINGHAM,DEPT CHILD HLTH,NOTTINGHAM,ENGLAND
[15] ST MARYS HOSP,MED SCH,PADDINGTON,LONDON,ENGLAND
[16] HOSP SICK CHILDREN,LONDON,ENGLAND
[17] UNIV OXFORD,OXFORD,ENGLAND
[18] NATL HLTH SERV DENMARK,COPENHAGEN,DENMARK