1. Laboratory of AIDS Immunology, Research Center for Human Immunodeficiency Virus, Institute for Virus Research; Kyoto University; Shogoin-Kawaramachi, Sakyo-ku Kyoto, Kyoto 606 Japan
2. Center for Biologics Evaluation and Research; Food and Drug Administration; Bethesda Maryland USA
3. R&D Wakenyaku Co.; Kyoto Kyoto 606 Japan