Assistant professor, Department of Aesthetic Plastic Surgery Center, the First Affiliated Hospital, college of Medicine, Zhejiang University, Hangzhou, China
Correspondence: Department of Aesthetic Plastic Surgery Center, the First Affiliated Hospital, college of Medicine, Zhejiang University, #79 Qingchun Road, Hangzhou, zhejiang Province, P.R.China, 310003 (Tel:+86-571-8723-5018. Fax:+86-571-8723-6562. E-mail: whl1616@126.com)