1. Respiratory Division and Sleep Laboratory,
2. Division of Respiratory and Respiratory Critical Care Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand; and
3. Respiratory Epidemiology Research Unit, Center for Research Outcomes Evaluation,
4. Division of Internal Medicine, Department of Medicine, and
5. Maternal–Fetal Medicine, Department of Obstetrics and Gynecology, McGill University Health Centre, Montreal, Quebec, Canada;
6. Department of Epidemiology and Biostatistics, McGill University, Montreal, Quebec, Canada