1. Division of Cellular and Gene Therapy Products, National Institute of Health Sciences, Tokyo 158-8501, Japan.
2. Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka 565-0871, Japan.
3. Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Tokyo 158-8501, Japan.
4. National Institute of Health Sciences, Tokyo 158-8501, Japan.