1 DSO National Laboratories, Defence Medical and Environmental Research Institute, Singapore, Singapore.
2 National Centre for Infectious Diseases, Singapore, Singapore.
3 Department of Medicine, Infectious Diseases Translational Research Program, Division of Infectious Diseases, National University Hospital, National University of Singapore, Singapore, Singapore.
4 Tan Tock Seng Hospital, Singapore, Singapore.
5 Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.