1 Adult Critical Care Unit, Royal London Hospital, London, United Kingdom.
2 Critical Care Research Team, Royal London Hospital, London, United Kingdom; William Harvey Institute, Queen Mary University of London, London, United Kingdom.
3 National Intensive Care Surveillance, Ministry of Health, Colombo, Sri Lanka; Intensive Care National Audit and Research Centre, London, United Kingdom.
4 Critical Care Department, University College Hospital, London, United Kingdom.
5 National Intensive Care Surveillance, Ministry of Health, Colombo, Sri Lanka.
6 Office of Deputy Director General (Education, Training and Research), Ministry of Health, Colombo, Sri Lanka.
7 National Intensive Care Surveillance, Ministry of Health, Colombo, Sri Lanka; Office of Director Tertiary Care Health, Ministry of Health, Colombo, Sri Lanka.
8 Post Basic College of Nursing, Ministry of Health, Colombo, Sri Lanka.
9 Mahidol Oxford Tropical Medicine Research Unit (MORU), Bangkok, Thailand.
10 Faculty of Medicine, University of Colombo, Colombo, Sri Lanka.
11 National Intensive Care Surveillance, Ministry of Health, Colombo, Sri Lanka; Mahidol Oxford Tropical Medicine Research Unit (MORU), Bangkok, Thailand; Faculty of Medicine, University of Colombo, Colombo, Sri Lanka. Electronic address: rashan@nicslk.com.