Chapman K R, Mannino D M, Soriano J B, Vermeire P A, Buist A S, Thun M J, Connell C, Jemal A, Lee T A, Miravitlles M, Aldington S, Beasley R
Asthma and Airway Centre, Toronto University Health Network, Toronto Western Hospital, Room 7-451 New East Wing, 399 Bathurst Street, Toronto, Ontario M5T 2S8, Canada.
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