Kato Yasuyuki, Masuda Gohta, Itoda Ichiro, Imamura Akifumi, Ajisawa Atushi, Negishi Masayoshi
Department of Infectious Diseases, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan.
J Travel Med. 2007 Sep-Oct;14(5):343-5. doi: 10.1111/j.1708-8305.2007.00139.x.