Evaluation of endoscopic approaches for deep gastric-muscle-wall biopsies: what works?

Elizabeth Rajan, Christopher J. Gostout, Matthew S. Lurken, Nicholas J. Talley, G. Richard Locke, Lawrence A. Szarka, Michael J. Levy, Kazuki Sumiyama, Jose G. de la Mora-Levy, Timothy A. Bakken, Gary J. Stoltz, Mary A. Knipschield, Gianrico Farrugia