1. Japan Association of Travel Agents Web site, Trends in International Tourism 2004. URL: http://www.jata-net.or.jp/tokei/004/2005/01.htm, as of 15 February 2006 (In Japanese).
2. Vaccination for international travelers in Tokyo quarantine station;Hashimoto;J Jpn Quarantine Med,2003
3. Tolerability of Multiple Vaccinations in Travel Medicine
4. Adverse reactions associated with simultaneous administration of multiple vaccines to travelers;Falvo;J Gen Intern Med,1994
5. Hamada A. Vaccination in the context of occupational health. In: Kamiya H, et al., editors. Vaccine no Jiten 2: Asakura Shoten; 2004. p. 291–7 (In Japanese).