1. Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
2. Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore
3. Department of Respiratory and Critical Care Medicine, Tan Tock Seng Hospital, Singapore
4. Department of Respiratory and Critical Care Medicine, Changi General Hospital, Singapore
5. Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
6. Department of Biological Sciences, National University of Singapore, Singapore
7. Institute of Systems Biology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
8. Institute of Molecular and Cell Biology, A*STAR, Singapore
9. University of Dundee, Ninewells Hospital and Medical School, Dundee, Scotland; and
10. Department of Otolaryngology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore