1. Department of Pathology/Section on Comparative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
2. National Institute of Environmental Health Sciences, National Toxicology Program (NTP), Molecular Pathogenesis, NTP Laboratory, Research Triangle Park, North Carolina, USA
3. Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, Linköping, Sweden
4. Immunoendocrinology, Division of Medical Biology, Department of Pathology and Medical Biology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
5. Placenta-Labor, Department of Obstetrics. University Hospital Jena, Jena, Germany
6. Department of Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany
7. Covance Laboratories GmbH, Muenster, Germany