1. Child Abduction and Serial Killer Unit, Criminal Incident Response Group, FBI Academy, Quantico, VA 22135, US.
2. DNA Unit II, FBI Laboratory, Washington, DC, US.
3. Forensic Science Research and Training Center, FBI Academy, Quantico, VA, US.
4. Field Epidemiology Survey Team, Departments of Dermatology and Cutaneous Surgery and Epidemiology and Public Health, University of Miami School of Medicine, Miami, FL, US.