Cross‐sectional biomarker comparisons in asthma monitoring using a longitudinal design: The eNose premise. Issue 10 (16th June 2020) - Abdel‐Aziz, Mahmoud I.; de Vries, Rianne; Lammers, Ariana; Xu, Binbin; Neerincx, Anne H.; Vijverberg, Susanne J. H.; Dagelet, Yennece W. F.; Kraneveld, Aletta D.; Frey, Urs; Lutter, René; Sterk, Peter J.; Maitland‐van der Zee, Anke H.; et al.