1. Division of Infectious Diseases, Department of Medicine, National University Hospital, Singapore
2. Division of Infectious Diseases, Department of Medicine, National University Hospital, Singapore, Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore;
Singapore, Institute for Health Innovation and Technology (iHealthtech), National University of Singapore; Singapore
3. Clinical Epidemiology and Medical Statistics Unit, Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy