Note: Funding Information: Conflicts of interest This author discloses the following: Bas Oldenburg received research grants from AbbVie, Celltrion, Ferring, Takeda, Galapagos, and Pfizer; and has served on advisory boards for Cablon, Pfizer, BMS, Janssen, MSD, Takeda, and Galapagos. The remaining authors disclose no conflicts.