Division of Trauma, Emergency Surgery and Surgical Critical Care, LAC+USC Medical Center, University of Southern California, Los Angeles, California, USA

Correspondence to Meghan R. Lewis, MD, FACS, Associate Professor of Clinical Surgery, Division of Trauma & Critical Care University of Southern California, LAC+USC Medical Center, 2051 Marengo Street, IPT, C5L100, Los Angeles, CA 90033, USA. Tel: +1 323 409 7761; fax: +1 323 441 9909; e-mail: [email protected]