Shimosako Junko, Onaka Takashi, Yamanouchi Masahiro, Yokota Masaharu, Nakamura Takeshi, Fujii Fumitoshi, Matsumoto Emiko, Shibata Hisako, Fukuda Masakazu, Tanaka Tomoyuki
Sakai City Institute of Public Health, Osaka 590-0953, Japan.
Jpn J Infect Dis. 2007 Nov;60(6):408-9.