1. Department of Internal Medicine, Division of Respiratory Medicine and Clinical Allergy, Fujita Health University, Toyoake, Japan;
2. Daiyukai General Hospital, Daiyukai Health System, Ichinomiya, Japan;
3. Division of Medical Statistics, Fujita Health University, Toyoake, Japan;
4. University of British Columbia, Center for Heat Lung Innovation, St Paul’s Hospital, Vancouver, Canada