Clip on Clip Closure Method (CCCM) for mucosal defect after colorectal endoscopic submucosal dissection: a prospective study

Interventions: For mucosal defect after ESD, only conventional clips are used and closed using Clip on Clip Closure Method. Primary outcome(s): Evaluate whether mucosal defect after ESD is closed by Clip on Clip Closure Method using conventional clip. Study Design: Single arm Non-randomized