Text and Data Mining valid from 2019-05-31
Received: 4 February 2019
Revised: 17 April 2019
Accepted: 15 May 2019
First Online: 31 May 2019
Compliance with ethical standards
: Frederic Baron has received travel grants from Celgene, Abbvie, Novartis and Sanofi. The remaining authors declare that they have no conflict of interest.