[1] Kolding Cty Hosp, Pediat Res Unit, DK-6000 Kolding, Denmark
[2] Global Initiat Asthma, Vancouver, WA USA
[3] Univ Wisconsin, UW Hosp & Clin, Madison, WI 53706 USA
[4] Univ Manitoba, Sect Allergy & Clin Immunol, Dept Pediat & Child Hlth, Winnipeg, MB R3T 2N2, Canada
[5] Univ Cape Town, ZA-7925 Cape Town, South Africa
[6] Univ Western Australia, Telethon Inst Child Hlth Res, Ctr Child Hlth Res, Perth, WA 6009, Australia
[7] Natl Childrens Hosp, San Jose, Costa Rica
[8] Chinese Univ Hong Kong, Dept Paediat, Hong Kong, Hong Kong, Peoples R China