Omid Ahmadi1, Jon A Mathy2,3. 1. Department of Otolaryngology and Head and Neck Surgery, Waikato Hospital, Hamilton, New Zealand. 2. Auckland Regional Plastic, Reconstructive and Hand Surgery Unit, Middlemore Hospital, Auckland, New Zealand. Jon.Mathy@middlemore.co.nz. 3. Department of Surgery, University of Auckland School of Medicine, Auckland, New Zealand. Jon.Mathy@middlemore.co.nz.