1. Management and Innovation for Longevity in Elderly Surgical Patients (MILES), Department of Surgery, National University of Singapore
2. Quality, Innovation & Improvement and Department of Surgery, Ng Teng Fong General Hospital & Jurong Community Hospital
3. Perioperative Medicine for Older People Undergoing Surgery (POPS), Department of Ageing and Health, Guy’s and St Thomas’ National Health Service Foundation Trust, London, United Kingdom
4. School of Life Course and Population Sciences, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom
5. Division of Surgery and Interventional Science, University College London, London, United Kingdom.