1. Assistant Director, Center for Human Toxicology and Research assistant professor, Pharmacology and Toxicology Center for Human Toxicology University of Utah 490 Biomedical Polymens Building Salt Lake City, Utah 84092, US.
2. Laboratory Technician, respectively, Center for Human Toxicology, University of Utah, Salt Lake City, Utah, US.
3. Assistant Director, respectively, Center for Human Toxicology, University of Utah, Salt Lake City, Utah, US.
4. Laboratory Director, respectively, Workplace Drug Testing Division, Northwest Toxicology, Inc., 1141 E. 3900 South, Salt Lake City, Utah, US.
5. Operations Manager, respectively, Workplace Drug Testing Division, Northwest Toxicology, Inc., 1141 E. 3900 South, Salt Lake City, Utah, US.