1 Fast and Chronic Programmes, Alexandra Hospital, National University Health System, Singapore, Singapore. jason_phua@nuhs.edu.sg.
2 Division of Respiratory and Critical Care Medicine, Department of Medicine, National University Hospital, National University Health System, Singapore, Singapore. jason_phua@nuhs.edu.sg.
3 Department of Critical Care Medicine, Ziauddin University, Karachi, Pakistan.
4 Network for Improving Critical Care Systems and Training, Colombo, Sri Lanka.
5 Mahidol Oxford Tropical Medicine Research Unit, Bangkok, Thailand.
6 University College London Hospitals, London, UK.