1. W H Organization WHO Statement Regarding Cluster of Pneumonia Cases in Wuhan, China (Beijing: WHO) 9 12 (2020)
2. N Zhu, et al. New England Journal of Medicine 385 543 (2020)
3. C W Lam, M H Chan and C K Wong Clinical Biochemist Reviews 25 121 (2004)
4. E I Azhar, et al. Infectious Disease Clinics 33 891 (2019)
5. D Tyrrell and M Bynoe Lancet 12 76 (1966)