[1] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[2] Royal Brompton Hosp, London, England
[3] AstraZeneca, Resp & Immunol, BioPharmaceut Med, Gaithersburg, MD USA
[4] AstraZeneca, BioPharmaceut R&D, Biometr Late Stage Dev Resp & Immunol, Warsaw, Poland
[5] Astrazeneca, BioPharmaceut R&D, Late Stage Dev Resp & Immunol, Gaithersburg, MD USA
[6] Amgen Inc, Global Med Affairs, Thousand Oaks, CA USA