I think you mixed up Circulation Journal ("Official Journal of the Japanese Circulation Society", http://www.j-circ.or.jp/english/cj/ http://www.j-circ.or.jp/en

I think you mixed up Circulation Journal ("Official Journal of the Japanese Circulation Society", http://www.j-circ.or.jp/english/cj/ http://www.j-circ.or.jp/english/cj/) with Circulation (Journal by the American Heart Association, http://circ.ahajournals.org/ http://circ.ahajournals.org/) The latter is the source of the coffee article.