WHO and ILO have formed 15 Working Groups of individual experts convened a meeting of the 25 lead reviewers of the 15 systematic reviews and meta-analyses that WHO and ILO are conducting with the support of a network of approximately 200 individual experts from 35 countries. These systematic reviews provide a crucial evidence base for the development of the WHO/ILO Joint Estimates. The meeting was hosted and co-funded by the European Agency for Safety and Health at Work (EU-OSHA), which is part of the European Commission’s Directorate-General Employment.