Many children with medical conditions fail to improve despite physicians' best efforts. Sometimes, we ascribe this failure to lack of adherence to therapy or to the severity of the condition. What we often fail to appreciate, however is that sometimes the lack of improvement can be explained by the patients' psychological states. The first section of Functional Symptoms in Pediatric Disease: A Clinical Guide teaches children's health care providers to recognize functional symptoms that can complicate organic disease as well as symptoms that are believed to be purely functional in...