Kimura Mikio, Suzaki Ai, Matsumoto Yasuharu, Nakajima Kazunori, Wataya Yusuke, Ohtomo Hiroshi
Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Toyama 1-23-1, Shinjuku-ku, Tokyo 162-8640, Japan.
J Travel Med. 2003 Mar-Apr;10(2):122-7. doi: 10.2310/7060.2003.31775.