1. National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
2. Pfizer Inc., Groton, Connecticut, USA
3. In vitro Methods Unit/European Centre for the Validation of Alternative Methods, Institute for Health and Consumer Protection, European Commission Joint Research Centre, Ispra, Italy
4. BIO.NRW Cluster Biotechnologie North Rhine–Westphalia, Düsseldorf, Germany
5. Maastricht University, Maastricht, the Netherlands