http://www.yomiuri.co.jp/iryou/news/iryou_news/20070518ik01.htm
http://www.yomiuri.co.jp/iryou/news/iryou_news/20070521ik05.htm
http://www.yomiuri.co.jp/iryou/news/iryou_news/20070621ik0f.htm
http://www.yomiuri.co.jp/iryou/news/iryou_news/20070708-OYT8T00083.htm
http://www.yomiuri.co.jp/iryou/news/iryou_news/20070708-OYT8T00086.htm