1 Department of Respiratory Medicine, National Reference Centre for Rare Pulmonary Diseases, Regional Competence Centre for Severe Pulmonary Arterial Hypertension, Louis Pradel Hospital, Lyon, France.
2 Department of Respiratory Medicine, National Reference Centre for Rare Pulmonary Diseases, Regional Competence Centre for Severe Pulmonary Arterial Hypertension, Louis Pradel Hospital; Claude Bernard University Lyon 1, Lyon, France.