Elspeth J R Hill1, Ida K Fox2. 1. Division of Plastic and Reconstructive Surgery, Washington University, St Louis, MO 63110, USA. 2. Division of Plastic and Reconstructive Surgery, Washington University, St Louis, MO 63110, USA; Plastic and Reconstructive Surgery Core, VA St Louis Health Care System, St Louis, MO, USA. Electronic address: foxi@wustl.edu.