Cassar Andrew, McLeod Christopher J, Nishimura Rick A
Division of Cardiovascular Diseases and Department of Internal Medicine, Mayo Clinic and the Mayo Foundation, 200 First Street SW, Rochester, MN 55905, USA.
J Am Coll Cardiol. 2013 Aug 6;62(6):e11. doi: 10.1016/j.jacc.2013.03.083. Epub 2013 Jun 4.