 America's poison centers are fielding increasingly severe cases, and you might be surprised at the reasons why. Christopher Holsteg, M.D., is director of the University of Virginia Health System's Blue Ridge Poison Center and chief of the Division of Medical Toxicology at UVA's School of Medicine. Dr. Holsteg, before we get to your findings, can you define what sorts of poisoning cases this trend includes for adults and for children? Because I would presume they differ.