1. University of Sydney; Faculty of Health Sciences; Cumberland Campus C42, Room 205, O Block, 75 East Street Sydney NSW Australia 1825
2. Tan Tock Seng Hospital; Nursing Service; Singapore Singapore
3. Sydney Orthopaedic Research Institute; Level 1, The Gallery 445 Victoria Avenue, Chatswood Sydney NSW Australia 2050
4. Duke-NUS Graduate Medical School; Centre for Quantitative Medicine, Office of Clinical Sciences; Singapore Singapore 138669
5. Singapore Clinical Research Institute Pte Ltd; Department of Biostatistics; Singapore Singapore
6. Tan Tock Seng Hospital; Department of Anaesthesiology; 11 Jalan Tan Tock Seng Singapore Singapore 308433