1 Lady Davis Institute of the Jewish General Hospital (Thombs, Kwakkenbos, Levis); Department of Psychiatry (Thombs, Kwakkenbos); Department of Epidemiology, Biostatistics, and Occupational Health (Thombs, Levis, Benedetti); Departments of Medicine, Psychology, and Educational and Counselling Psychology (Thombs), McGill University, Montréal, Que.; Behavioural Science Institute, Clinical Psychology (Kwakkenbos), Radboud University, Nijmegen, the Netherlands; Respiratory Epidemiology and Clinical Research Unit (Benedetti), McGill University Health Centre, Montréal, Que. brett.thombs@mcgill.ca.
2 Lady Davis Institute of the Jewish General Hospital (Thombs, Kwakkenbos, Levis); Department of Psychiatry (Thombs, Kwakkenbos); Department of Epidemiology, Biostatistics, and Occupational Health (Thombs, Levis, Benedetti); Departments of Medicine, Psychology, and Educational and Counselling Psychology (Thombs), McGill University, Montréal, Que.; Behavioural Science Institute, Clinical Psychology (Kwakkenbos), Radboud University, Nijmegen, the Netherlands; Respiratory Epidemiology and Clinical Research Unit (Benedetti), McGill University Health Centre, Montréal, Que.