Conflict of interest statement
The authors has the following potential conflicts of interest: Tilo Biedermann gave advice to or got an honorarium for talks or received a research grant from the following companies: ALK, Mylan, Novartis, Sanofi-Regeneron, Phadia Thermo-Fisher, Celgene, Lilly Deutschland GmbH, Leo Pharma, Symrise AG; Tina Maria Greve is employed by ALK; Peter Couroux and Mika Mäkelä has nothing to disclose.