RG reports consultancy, speaker fees, research or travel grants from or for Amgen, Sanofi-Regeneron, Merck-Serono, MSD, Kyowa-Kirin, Almirall, SUN Pharma, Recordati, BMS, Pierre-Fabre, Delcath, Janssen, Novartis.
Flatt et al. (Tue,) studied this question.