1. Department of Pediatrics, Baylor College of Medicine, University of Texas Medical Branch at Galveston, Texas; Department of Pediatrics, New York Medical College, Munger Pavilion, Valhalla, New York 10595
2. Department of Pediatrics, Baylor College of Medicine, University of Texas Medical Branch at Galveston, Texas
3. Southeast Texas Poison Center, University of Texas Medical Branch at Galveston, Texas
4. Southwest Center for Occupational and Environmental Health, University of Texas Houston Health Science Center, Texas