W. Yang

发表

Young Han Lee, Ho-Taek Song, J. Suh, 2013, The American journal of case reports.

J. Cheong, J. Hahn, Jin Seok Kim, 2006, Yonsei medical journal.

Y. Youn, Jie Hyun Kim, J. Chung, 2006, Gastrointestinal endoscopy.