1. Singhealth Internal Medicine, Singapore General Hospital, Outram Rd, Singapore
2. Department of General Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore
3. Division of Thoracic Surgery, Department of General Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore
4. Department of Neurology, National Neuroscience Institute, 11 Jalan Tan Tock Seng, Singapore