1 1Foot and Ankle Unit, Hospital Quirón Barcelona, Barcelona, Spain 2Human Anatomy and Embriology Unit, Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain 3Manresa Health Science School, University of Vic-Central University of Catalonia, Barcelona, Spain 4Foot and Ankle Unit, Department of Orthopaedic Surgery, Heatherwood and Wexham Park Hospitals, Frimley Health NHS Trust, Ascot, Berkshire, United Kingdom 5Foot and Ankle Unit, Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota.