1. National Research Council (NRC) Post Doctoral Research, National Risk Management Research Laboratory, United States Environmental Protection Agency, Cincinnati, Ohio.
2. Sêr Cymru National Research Network for Low Carbon, Energy and Environment, School of Environment, Natural Resources and Geography, Bangor, United Kingdom.
3. National Risk Management Research Laboratory, United States Environmental Protection Agency, Cincinnati, Ohio.
4. National Exposure Research Laboratory, United States Environmental Protection Agency, Cincinnati, Ohio.