The purpose of this Request for Proposals is to identify a suitable contractor to conduct systematic reviews of cost-effectiveness studies to inform WHO guidelines on insulin therapy for type 1 diabetes mellitus (T1DM) in adults. See detailed Terms of Reference and bidding instructions under “Documents” below.  Please note: it is NOT necessary to click on “Express Interest” on the top right-hand side of the screen. In order to inform WHO that you are interested in participating in this Request for Proposals, please follow the provisions of the RFP document below.