Article History
First Online: 4 April 2019
Conflict of interest
: M.S. Jacobs and Z. Campmans declare that they have no conflict of interest. M. van Hulst reports grants from Bayer and personal fees from Boehringer Ingelheim all outside the submitted work. R.G. Tieleman reports grants and personal fees from Boehringer Ingelheim, personal fees from Bayer and personal fees from Pfizer/Bristol Meyer Squibb all outside the submitted work.