1. Director of the forensic and environmental toxicology laboratory and associate professor, Departments of Pathology and Pharmacology, St. Louis University School of Medicine, 1402 S. Grand Blvd. St. Louis, MO 63104, US.
2. Chief toxicologist, Office of the Medical Examiner, St. Louis County, MO and clinical instructor, Department of Pathology, St. Louis University School of Medicine, St. Louis, MO, US.
3. Deputy medical examiner, Office of the Medical Examiner, St. Louis County, MO and associate professor, Department of Pathology, St. Louis University School of Medicine, St. Louis, MO, US.