1. Department of Radiology, Division of Thoracic Imaging and Intervention, Massachusetts General Hospital, 55 Fruit St, Founders 202, Boston, MA 02114
2. Department of Radiology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
3. Department of Medicine, Cancer Center, Massachusetts General Hospital, Boston, MA
4. Division of Pulmonary & Critical Care Medicine, Department of Medicine, Massachusetts General Hospital, Boston, MA