1. Pulmonary Hypertension Clinic, Section of Pulmonary, Sleep and Critical Care Medicine, Department of Medicine, West Virginia University School of Medicine, Morgantown, West Virginia 26505
2. Director of Pulmonary Hypertension Program, Section of Pulmonary, Sleep and Critical Care Medicine, Department of Medicine, New York University Grossman School of Medicine, New York, New York 10016, USA