In this guide for parents, Johnson, a pediatrician, explains how to communicate effectively with their child's doctors. He explains how doctors think and evaluate symptoms, use lab tests, and decide on a diagnosis and treatment. Discussion of differential diagnoses for common problems and types of medications used are included. Other chapters address dealing with difficult doctors and specialists, and medical training. The final chapter illustrates the process through five of Johnson's cases. There is no bibliography. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)