1 National Institute of Environmental Health Sciences (NIEHS), NTP Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM), 530 Davis Drive, Research Triangle Park, North Carolina 27560, United States.
2 National Center for Toxicological Research, 3900 NCTR Road, Jefferson, Arkansas 72079, United States.
3 Institute of Structural Biology, Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, D-85764 Neuherberg, Germany.