1 Department of Chest Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal, Montreal, Quebec, Canada. Electronic address: catherine.lemiere@umontreal.ca.
2 Department of Chest Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal, Montreal, Quebec, Canada; Institute for Work and Health, Epalinges-Lausanne, Switzerland; Division of Pulmonary Diseases, Geneva University Hospitals, Geneva, Switzerland.
3 Department of Chest Medicine, Hôpital du Sacré-Coeur de Montréal, University of Montreal, Montreal, Quebec, Canada.