ISBN 978-0-443-10168-7. ↑ http://www.google.com/patents/US5018177 ↑ American Heart Association‚Äôs Heart Disease and Stroke Statistics‚Äî2010 Update ↑ Roldán-Chicano, R; Oñate-Sánchez, RE; López-Castaño, F; Cabrerizo-Merino, MC; Martínez-López, F (May 1, 2006).