TY - JOUR AN - 21 AU - Sumiyama,K. AU - Gostout,C.J. AU - Rajan,E. TI - Transesophageal mediastinoscopy by submucosal endoscopy with mucosal flap safety valve technique. JO - Gastrointest Endosc PY - 2007 VL - 65 SP - 679-683 M2 - 679 DO - 10.1016/j.gie.2006.10.017 L3 - PubMed-ID: 17383463 ER -