Abstract
1) Department of Microbiology, Faculty of Medicine, Chiang Mai University, Chiang Mai
2) Department of Microbiology and Immunology, Nippon Medical School, Tokyo
3) Central Virus Diagnostic Laboratory, National Institute of Health, Japan, Tokyo
4) Department of Microbiology, Institute of Public Health, Tokyo
5) Department of Family Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai
6) Department of Pediatrics, McCormick Hospital, Chiang Mai
7) Department of Pediatrics, Faculty of Medicine, Chiang Mai University, Chiang Mai