Severe asthma: Entering an era of new concepts and emerging therapies: Highlights of the 4th international severe asthma forum, Madrid, 2018. Issue 11 (31st May 2019) - Seys, Sven F.; Quirce, Santiago; Agache, Ioana; Akdis, Cezmi A.; Alvaro‐Lozano, Montserrat; Antolín‐Amérigo, Dario; Bjermer, Leif; Bobolea, Irina; Bonini, Matteo; Bossios, Apostolos; Brinkman, Paul; Bush, Andy; et al.