Financial/Nonfinancial Disclosures The authors have reported to CHEST the following: J. W. has received grants or contracts to his institution from Astra Zeneca, Bayer, Janssen, and Merck; consulting fees from Janssen and Merck; honoraria from Janssen and Merck; payment for expert testimony from Sprigings Intellectual Property Law; travel support from Janssen; participation on Data Safety and Monitoring Board or advisory board from Janssen, Acceleron, and the Université de Laval; and has unpaid leadership role at the Pulmonary Hypertension Association of Canada. O. S. has received grants or contracts to his institution from Acceleron, AOP Orphan, Janssen, and MSD; consulting fees from Altavant, Gossamer Bio, Janssen, and MSD; honoraria from AOP Orphan, Janssen, Ferrer, and MSD; and has participated on a Data Safety Monitoring Board or Advisory Board from Acceleron, Altavant, Gossamer Bio, Janssen, MSD, and Ferrer.