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Design of single-incision transumbilical laparoscopic bariatric surgery (multiple ports) by Huang et al. Schematic of a 4-6-cm ω-incision in the suprumbilical area. (A) Schematic of the distance between the trocars (5 mm, 12 mm, 12 mm) that can reach (B) 4-cm more with this design thus increasing the space for manipulation.
