Percutaneous direct-endoscopic necrosectomy for walled-off pancreatic necrosis - Yamamoto, N.; Isayama, H.; Takahara, N.; Sasahira, N.; Miyabayashi, K.; Mizuno, S.; Kawakubo, K.; Mohri, D.; Kogure, H.; Sasaki, T.; Tada, M.; Koike, K. (Endoscopy, 2013)