1. From the Centre for Pulmonary Hypertension at Thoraxclinic Heidelberg, Heidelberg, Germany (E.G., P.H., N.E., F.M., C.N., F.P., J.W.); Second University of Naples, Monaldi Hospital, Naples, Italy (A.D.); Department of Pneumology, Clinic Grosshansdorf, Grosshansdorf, Germany (M.C.); Erasme University Hospital Free University of Brussels, Brussels, Belgium (R.N.); Department of Human Genetics, University of Heidelberg, Heidelberg, Germany (C.F.); and Cardiology Division, “Cava de’ Tirreni and Amalfi...