1 Montreal Behavioral Medicine Centre, CIUSSS-NIM, Hôpital du Sacré-Coeur de Montréal, Montreal, Quebec, Canada; Department of Exercise Science, Concordia University, Montreal, Quebec, Canada. Electronic address: simon.bacon@concordia.ca.
2 Department of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, NSW, Australia; HMRI, University of Newcastle, Newcastle, NSW, Australia.