1. Division of Respiratory Diseases, Department of Internal Medicine,
2. Department of Translational Research for Exosomes, and
3. Department of Respiratory Medicine, Respiratory Center, Toranomon Hospital, Tokyo, Japan; and
4. Division of Thoracic Surgery, Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan;
5. Department of Molecular and Cellular Medicine, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan