Received: 4 April 2020
Revised: 7 July 2020
Accepted: 16 July 2020
First Online: 28 July 2020
Compliance with ethical standards
: FB has received travel grants from Celgene, Abbvie, Novartis, and Sanofi as well as honoraria from Merck and Abbvie. The remaining authors declare that they have no relevant conflict of interest.