 In 1960, it changed its name again to the American Thoracic Society.Originally the medical section of the American Lung Association, the Society became independently incorporated in 2000 as a 501 (c) (3) organization.Pulmonology, critical care, sleep medicine, infectious disease, pediatrics, allergy/immunology, thoracic surgery, behavioral science, environmental and occupational medicine, physiology, molecular biology, among others.