 There are also Technical Support Units that guide "the production of IPCC assessment reports and other products".Researchers from 40 countries, representing 91 authors and editors contributed to the report, which includes over 6,000 scientific references.In his 1 October 2018 opening statement at the 48th Session held in Incheon, Korea, Hoesung Lee, who has been Chair of the IPCC since 6 October 2015, described this IPCC meeting as "one of the most important" in its history.