Research recommendation(s) from an individual piece of guidance Guidance: Implantation of a duodenal–jejunal bypass sleeve for managing obesity Date issued: 27 November 2013 Research recommendations coming out of this guidance Well-controlled studies are needed to support the current limited evidence on weight loss in the short term. They should document patient selection, all complications (while the device is in place and after its removal) and technical problems associated with placing and removing the device.