[The effect of endoscopic dacryocystorhinostomy on different lacrimal duct obstruction]

Xiangdong Wang1,2, Xinjun Chen3, Yun Hao1

  • 1Department of Otolaryngology Head and Neck Surgery,Beijing Tongren Hospital,Capital Medical University,Key Laboratory of Otolaryngology Head and Neck Surgery(Capital Medical University),Ministry of Education,Beijing,100730,China.