Post written by Hiroyuki Aihara, MD, PhD, from the Developmental Endoscopy Lab, Harvard Medical School, and Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women’s Hospital, Boston, Massachusetts, USA. The lack of reliable countertraction in endoscopic submucosal dissection (ESD) contributes to its technical demand and increased procedure time. In our previous ex vivo study, we …