1. Division of Pulmonary & Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
2. Department of Microbiology and Infectious Diseases, Faculty of Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
3. Department of Respiratory Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
4. Department of Infection Control and Laboratory Diagnostics, Internal Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
5. Department of Ophthalmology, Wayne State University, Detroit, Michigan, USA