Jae-Ho Chung1, Deok-Woo Kim2. 1. Department of Plastic and Reconstructive Surgery, Korea University Ansan Hospital, 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, Republic of Korea. 2. Department of Plastic and Reconstructive Surgery, Korea University Ansan Hospital, 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, Republic of Korea. deokwookim@gmail.com.