En-Wei Liu1, Tony Chieh-Ting Huang1,2, Hsu-Tang Cheng3. 1. Division of Plastic and Reconstructive Surgery, Department of Surgery, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan. 2. Division of Plastic and Reconstructive Surgery, Mayo Clinic, Rochester, Minnesota. 3. Division of Plastic and Reconstructive Surgery, Department of Surgery, Asia University Hospital, Asia University College of Medical and Health Science, Taichung, Taiwan.