[1] Academ Med Centrum, Divisie Neurozintuigspecialismen, Amsterdam, Netherlands
[2] Univ Tartu, Lung Clin, EE-50090 Tartu, Estonia
[3] MMA, Hosp 7, Moscow, Russia
[4] Kaunas Med Univ Hosp, Clin Pulmonol & Clin Immunol, Kaunas, Lithuania
[5] GlaxoSmithKline Inc, Clin Dev, Greenford, Middx, England
[6] GlaxoSmithKline Inc, Stat & Programming, Res Triangle Pk, NC USA