1. Assistant professor, LSU Medical Center, 1900 Gravier St. New Orleans, LA 70112-2232, US.
2. Coroner, St. Tammany Parish, Covington, LA, US.
3. Director of Clinical Toxicology and toxicologist, respectively, T.F. Puckett Laboratory, Hattiesburg, MS, US.
4. Associate director, Laboratory Corporation of America, Memphis, TN, US.