As-needed Dual Inhaled Corticosteroid–Formoterol in Mild Asthma: Scientific Evidence Richard Beasley, Diogenes S. Ferreira, Alberto Papi

Association of β 2-adrenergic agonists and tiotropium: is the combination justified? Cazzola, Matera, O'Donnell

Beta-agonist Use and Increased Asthma Mortality: Reality or Fiction? Nan Zhao, Samy Suissa, Pierre Ernst