At the PPTOX IV conference held in Boston, U.S., in October 2014 (previously reported on by the FPF), a poster presentation by Professor Thomas Webster of the Boston University School of Public Health, U.S., discussed the latest use of statistical approaches for assessment of combined exposures. Exposure analysis to environmental chemical mixtures is a well-known issue in environmental epidemiology. Currently, it remains unknown, which are the most effective/comprehensive methods for doing such analyses. As highlighted by Webster, new statistical methods for evaluating associations between exposures to mixtures and health effects will therefore be compared at an interactive workshop organized by the National Institute of Environmental Health Sciences (NIEHS). The workshop will be held on July 13-14, 2015 in Research Triangle Park, North Carolina, U.S..