1. From the Center for Experimental Rheumatology and Zurich Center for Integrative Human Physiology (M.B., M.T., R.E.G., B.A.M., S.G., L.C.H.), University of Zurich, Switzerland; and Working Group for Pulmonary Hypertension (M.B., M.F., S.U., R.S., L.C.H.), Department for Internal Medicine, University Hospital Zurich, Switzerland.