1. Associate professor, graduate student, and former graduate student, respectively, Department of Criminal Justice, University of Alabama at Birmingham, Birmingham, AL 35294, US.
2. Laboratory manager, GC/MS technician, and GC/MS technician, respectively, Environmental Health Research and Testing, Inc., Birmingham, AL, US.
3. Chief, Alcoholism Research, VA Medical Center, and research associate professor, Department of Surgery, University of Alabama at Birmingham, School of Medicine, Birmingham, AL, US.