Donald G. Barceloux, MD, is a Medical Toxicologist in the Department of Emergency Medicine at Pomona Valley Community Hospital. He has served as a Clinical Professor of Medicine at the University of California, Los Angeles School of Medicine for over 30 years.Robert B. Palmer, PhD, is a board-certified clinical toxicologist in private practice with Toxicology Associates, PLLC and an attending toxicologist at the Rocky Mountain Poison and Drug Service in Denver, CO. He is a frequent author and speaker on many aspects of clinical and forensic toxicology.