1. Department of Otolaryngology; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
2. Research Center; Axe Maladies Chroniques; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
3. Formerly of the Health Effects Laboratory Division; CDC/NIOSH; Morgantown WV USA
4. Burleson Research Technologies, Inc.; Morrisville NC USA
5. Department of Chest Medicine; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada