1. Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Present address; Department of Physical Medicine and Rehabilitation, Tohoku University Graduate School of Medicine, Sendai, Japan
3. Department of Rehabilitation Medicine, Toho University Graduate School of Medicine, Tokyo, Japan
4. Division of Tumor Immunobiology, Department of Cancer Medical Science, Tohoku University Graduate School of Medicine, Sendai, Japan
5. Department of Vascular Biology, Institute of Development, Aging, and Cancer, Tohoku University, Sendai, Japan
6. Department of Immunology, Juntendo University School of Medicine, Tokyo, Japan