Rodzlan Hasani, W. S., Ganapathy, S. S., Zhuo Lin, C., Mat Rifin, H., Bahari, M. N., Ghazali, M. H., Lodz, N. A., Ramli, M. H. T., Ab Majid, N. L., Miaw Yn, J. L., Mohd Yusoff, M. F., Ahmad, N. A., Suleiman, A., Yusoff, A. F., Balan, V. and Ngadiman, S. (2021) “Comorbidities and clinical features related to severe outcomes among COVID-19 cases in Selangor, Malaysia”, Western Pacific Surveillance and Response, 12(1), p. 7. doi: 10.5365/wpsar.2020.11.3.007.