1. Department of Microbiology and Immunology Tohoku University Graduate School of Medicine Sendai Japan
2. Department of Pediatric Surgery Tohoku University Graduate School of Medicine Sendai Japan
3. Department of Tropical Medicine Hawaii Center for AIDS John A. Burns School of Medicine University of Hawaii Manoa HI USA
4. Department of Clinical and Experimental Medicine, Pharmacology Section Perugia University Medical School Perugia Italy
5. Laboratory of Molecular Cell Biology Graduate School of Medicine and Pharmaceutical Sciences University of Toyama Toyama Japan