Catherine Dang, MD a, Kang Ting, DMD, DMSc b, Chia Soo, MD a, Michael T Longaker, MD, FACS c, H.Peter Lorenz, MD ⁎, c 
a Division of Plastic and Reconstructive Surgery, Department of Surgery, University of California, Los Angeles, CHS 73-060, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
b School of Dentistry, University of California, Los Angeles, CHS 30-113, 10833 Le Conte Avenue, Los Angeles, CA 90095, USA
c Division of Plastic and Reconstructive Surgery, Department of Surgery, Pediatric Surgical Research Laboratory, Stanford University Medical Center, 257 Campus Drive,Stanford, CA 94305-5148, USA