Cosio Manuel G, Saetta Marina, Agusti Alvar
Respiratory Division at Royal Victoria Hospital and the Meakins-Christie Laboratories in the Department of Medicine, McGill University, Montreal, QC H3A 1A1, Canada.
N Engl J Med. 2009 Jun 4;360(23):2445-54. doi: 10.1056/NEJMra0804752.