[1
]
School of Public Health, Fudan University, Shanghai, China. wang_p@fudan.edu.cn.
[2
]
Key Lab of Health Technology Assessment, National Health Commission of the People's
Republic of China (Fudan University), Shanghai, China. wang_p@fudan.edu.cn.
[3
]
Department of Otolaryngology - Head and Neck Surgery, National University Hospital,
Singapore, Singapore.
[4
]
Saw Swee Hock School of Public Health, National University of Singapore, Singapore,
Singapore.