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  • Blood Clots. YourTotalHealth. http://yourtotalhealth.ivillage.com/blood-clots.print.html
  • Coronary Artery Disease -- Symptoms. ClevelandClinic. http://my.clevelandclinic.org/heart/disorders/cad/cadsymptoms.aspx
  • Coronary Artery Spasm. American Heart Association. http://www.americanheart.org/presenter.jhtml?identifier=4520
  • Coronary artery spasm. MedLine Plus. http://www.nlm.nih.gov/medlineplus/ency/article/000159.htm
  • Coronary Artery Spasm. Texas Heart Institute. http://www.texasheartinstitute.org/HIC/Topics/Cond/CoronaryArterySpasm.cfm
  • Coronary artery spasm: What is it? MayoClinic.com. http://www.mayoclinic.com/health/coronary-artery-spasm/AN01371