1. Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea.
2. Dami IM Clinic, Seoul, Korea.
3. Seoulbom IM Clinic, Seoul, Korea.
4. Jong-Woong Kim IM Clinic, Seoul, Korea.
5. Hamchun Medical Clinic, Incheon, Korea.
6. Coco ENT Clinic, Seoul, Korea.
7. Myung ENT Clinic, Seoul, Korea.
8. National Allergy Asthma Bronchitis Institute, Kolkata, India.
9. Institute of Respiratory Medicine, Kuala Lumpur, Malaysia.
10. Division of Thoracic Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
11. Department of Otorhinolaryngology, Khon Kaen University, Khon Kaen, Thailand.
12. Merck & Co., Inc., Kenilworth, NJ, USA.
13. Merck & Co., Inc. (retired), Kenilworth, NJ, USA.
14. Optum, Sydney, Australia.
15. Department of Otolaryngology, National University of Singapore, Singapore, Singapore.
16. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.