1. Department of Plastic and Reconstructive Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China
2. Medical Insurance and New Rural Cooperative Medical Insurance Administration Center, The 252nd Hospital of PLA, Baoding, 071000, China
3. Department of Burn and Plastic Surgery, The 253rd Hospital of PLA, Hohhot, 010051, China
4. The First Brigade of Fourth Military Medical University, Xi'an, 710032, China
5. Department of Otolaryngology-Head and Neck Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032, China