Authors: Mark L Levy; P N R Dekhuijzen; P J Barnes; M Broeders; C J Corrigan; B L Chawes; L Corbetta; J C Dubus; Th Hausen; F Lavorini; N Roche; J Sanchis; Omar S Usmani; J Viejo; W Vincken; Th Voshaar; G K Crompton; Soren Pedersen Journal: NPJ Prim Care Respir Med Date: 2016-04-21 Impact factor: 2.871