1 SingVaSC, Singapore Vascular Surgical Collaborative, Singapore, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
3 SingVaSC, Singapore Vascular Surgical Collaborative, Singapore, Singapore; Cardiovascular Research Institute, National University of Singapore, Singapore, Singapore; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore; Division of Vascular Surgery, National University Heart Centre, Singapore, Singapore. Electronic address: suramctl@nus.edu.sg.