Article History
Accepted: 21 August 2019
First Online: 24 September 2019
Competing interests
: J.S. declares that he has received honoraria for consultancies or for being a member of the speakers’ bureau from Abbvie, Boehringer-Ingelheim, Janssen, Lilly, Merck, Novartis, Pfizer and UCB. D.P. declares that he has received honoraria for consultancies or for being a member of the speakers’ bureau from Abbvie, Celgene, Lilly, Merck, Novartis, Pfizer, Roche and UCB. P.M. declares no competing interests.