1. UCL Division of Surgery and Interventional Sciences, UCL Institute for Orthopaedics and Musculoskeletal Sciences, University College London, London, United Kingdom.
2. Department of Plastic and Reconstructive Surgery, Royal Stoke University Hospital, Stoke-on-Trent, United Kingdom.
3. The Vascular Biology and Therapeutics Program and the Department of Surgery, Yale University School of Medicine, New Haven, Connecticut.