1 Department of Medicine, Respiratory Epidemiology and Clinical Research Unit, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada. Electronic address: sushmita.pamidi@mcgill.ca.
2 Department of Medicine, Respiratory Epidemiology and Clinical Research Unit, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada; Department of Epidemiology, Biostatistics & Occupational Health, McGill University, Canada.
3 Department of Medicine, University of Chicago, Chicago, IL, United States of America.