1. Department of Plastic Surgery, Qingdao University, Qingdao, China
2. Department of Plastic Surgery, Fujian Provincial Maternity and Children’s Hospital, Fuzhou, China
3. Child Care Center, Fujian Provincial Maternity and Children’s Hospital, Fuzhou, China
4. Department of Plastic Surgery, Yantai Yuhuangding Hospital, Yantai, China
5. Medical Plastic and Cosmetic Center, The Affiliated Hospital of Qingdao University, Qingdao, China