1. a Department of Research and Development, Plasma Fractionation Center, Japanese Red Cross, Hiroo 4, Shibuya-ku, Tokyo 150, Japan
2. b Department of Research and Development, Plasma Fractionation Center, Japanese Red Cross, Hiroo 4, Shibuya-ku, Tokyo 150, Japan
3. c Department of Research and Development, Plasma Fractionation Center, Japanese Red Cross, Hiroo 4, Shibuya-ku, Tokyo 150, Japan