1. Kosair Children’s Hospital Research Institute, Departments of Pediatrics, Pharmacology, and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky
2. Section of Pediatric Pulmonology, Department of Pediatrics, Louisiana State University Health Sciences Center, Shreveport, Louisiana
3. Departments of Pathology and Pediatrics, University of California at San Diego, School of Medicine, San Diego, California
4. Office of the Medical Examiner, County of San Diego, San Diego, California
5. Department of Pediatrics, University of Maryland School of Medicine, Baltimore, Maryland