Over the past decade, concerns over traditional childhood diseases such as measles and whooping cough have been supplanted by developmental disorders such as autism and attention-deficit disorder and attention-deficit/hyperactivity disorder (ADD/ADHD). Autism now affects 1 in 150 eight-year-olds in the United States,[1] while more than 4 million children nationwide qualify for a diagnosis of ADD/ADHD.[2,3] [...]