Muraoka Ryoko, Okazaki Michiko, Fujimoto Yoko, Jo Nobutoshi, Yoshida Ritsuko, Kiyoyama Tomoko, Oura Yuko, Hirakawa Kazuo, Jyukurogi Mayumi, Kawano Kimiko, Okada Mika, Shioyama Yoko, Iryoda Kazunori, Wakamatu Hideo, Kawabata Norihiko
Miyazaki Prefecture Central Public Health Office, Miyazaki 880-0032, Japan.
Jpn J Infect Dis. 2007 Nov;60(6):410-1.