[1] BELFAST CITY HOSP, BELFAST, NORTH IRELAND
[2] BENCARD ALLERGY CLIN, GREAT W RD, BRENTFORD, MIDDLESEX, ENGLAND
[3] UNIV HOSP UPPSALA, BLOOD CTR, S 750 14 UPPSALA, SWEDEN
[4] BEECHAM RES LABS, CHEMOTHERAPEUTIC RES CTR, BROCKHAM PK, BETCHWORTH, SURREY, ENGLAND