1. Internal Medicine Department,Riviera Chablais Hospital, Rennaz, Switzerland
2. Pulmonary Hypertension Program, Geneva University Hospitals, Geneva, Switzerland
3. Paediatric Cardiology Unit, University Hospitals of Geneva, Switzerland; Centre Universitaire Romand De Cardiologie Et Chirurgie Cardiaque Pédiatrique, University of Geneva and Lausanne, Switzerland
4. Department of Medicine Specialties, Division of Pulmonary Diseases, Geneva University Hospitals, Geneva, Switzerland