1. Regeneron Pharmaceuticals Inc, Tarrytown, NY, USA
2. Pfizer Inc, Global Pathology and Investigative Toxicology, Groton, CT, USA
3. ToxPath Specialists LLC [a StageBio Company], Frederick, MD, USA
4. Neuroscience Associates, Knoxville, TN, USA
5. *
6. Covance Laboratories Inc, Madison, WI, USA
7. GEMpath Inc., Longmont, CO, USA * Deceased