Ost, Piet http://orcid.org/0000-0002-2203-4848
Article History
First Online: 9 December 2019
Competing interests
: P.O. holds institutional research grants from Bayer, Ferring, Merck and Varian, has received consultancy fees from Bayer, Ferring and Janssen, and travel support from Ferring, with all funds going to his institution.