[1] Swiss Inst Allergy & Asthma Res, CH-7270 Davos, Switzerland
[2] Univ Bonn, D-5300 Bonn, Germany
[3] Odense Univ, Odense, Denmark
[4] Natl Jewish Med & Res Ctr, Denver, CO USA
[5] Univ Colorado, Sch Med, Denver, CO 80202 USA
[6] Univ Geneva, Childrens Hosp, Geneva, Switzerland
[7] McGill Univ, Montreal, PQ, Canada
[8] Hannover Med Sch, Hannover, Germany
[9] Univ Zagreb, Ctr Hosp, Zagreb 41000, Croatia
[10] Univ Zagreb, Sch Med, Zagreb 41000, Croatia
[11] Univ Munster, D-4400 Munster, Germany
[12] Univ Padua, Padua, Italy
[13] Asthma & Allerg Dis Ctr, Charlottesville, VA USA
[14] Karolinska Univ Hosp Solna, Stockholm, Sweden
[15] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada
[16] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[17] Univ Penn, Sch Med, Philadelphia, PA 19104 USA
[18] Tampere Univ Hosp, Tampere, Finland
[19] Charite, Berlin, Germany
[20] Tech Univ Munich, D-8000 Munich, Germany
[21] Hannover Med Sch, D-3000 Hannover, Germany