US Department of Health and Human Services. National Institutes of Health. National Heart, Lung, and Blood Institute. What Is cardiomyopathy? http://www.nhlbi.nih.gov/health/health-topics/topics/cm/. Updated October 23, 2015. Accessed December 22, 2015.
Restrictive cardiomyopathy. Texas Heart Institute. http://www.texasheart.org/HIC/Topics/Cond/restrict.cfm. Updated July 2015. Accessed December 22, 2015.
Weinberger HD. Cardiac sarcoidosis: types. National Jewish Health. http://www.nationaljewish.org/healthinfo/conditions/cardiac-sarcoidosis/types. Reviewed November 2012. Accessed January 2016.