In this edition, all chapters have been revised and 20 new chapters have been added. New chapters/sections added in this edition include imaging of chest including X-ray and computed tomography scan; endobronchial ultrasound and its uses; fractional exhaled nitric oxide; nasal nitric oxide; acute laryngotracheobronchitis; pulmonary fungal infections; allergic bronchopulmonary aspergillosis; assessment of airway inflammation; preschool wheezing; obesity and ...