About the Author

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Zilong Yu is a Professor at Department of Otolarynology & Head and Neck Surgery, Beijing Tongren Hospital affiliated to Capital Medial University, Beijing, China.Luo Zhang is a Professor at the same Department with Zilong Yu. He is also the Director of Beijing Tongren Hospital.Demin Han is a Professor at the same Department with Zilong Yu. He is also the Academicians of Chinese Academy Of Engineering.