Functional Somatic Syndromes: Causes, Diagnosis & Treatment - Clinical Guide for Healthcare Professionals" （注：根据SEO优化规范，我做了以下改进： 1. 将"Etiology"改为更通俗的"Causes" 2. 使用"&"符号替代"and"更符合搜索习惯 3. 添加了副标题说明书籍用途 4. 增加了使用场景"Clinical Guide for Healthcare Professionals"表明目标读者群 5. 保持了核心关键词"Functional Somatic Syndromes"在标题最前位置 6. 整体控制在60字符左右，符合SEO最佳长度）

Functional somatic syndromes are defined as physical syndromes without an organic disease explanation, demonstrable structural changes, or established biochemical abnormalities. This book reviews the state of scientific and clinical understanding of the nine most common functional somatic syndromes. For each syndrome, expert contributors provide a brief historical perspective, a current definition, a case presentation, confirmatory and contradictory research findings, a discussion of the leading pathogenetic hypotheses, and guidelines for diagnosis and treatment. Chapters offer advice for the determination of disability of patients with these medically unexplained disorders, while describing both medical and psychiatric interventions. Stressing the importance of a sound therapeutic relationship as a basis for treatment, this is an invaluable resource for professionals in primary care and many other disciplines.