1. Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts;
2. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea;
3. Department of Respiratory Diseases, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China;
4. Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan;
5. Lovelace Respiratory Research Institute, Albuquerque, New Mexico
6. Biochemistry and Molecular Biology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota; and