Research recommendation(s) from an individual piece of guidance Guidance: Implantation of a duodenal–jejunal bypass liner for managing type 2 diabetes Date issued: 27 March 2015 Research recommendations coming out of this guidance Current evidence on the safety and efficacy of implantation of a duodenal–jejunal bypass liner for managing type 2 diabetes is limited in quality and quantity. Therefore the procedure should only be used in the context of research.