出　典 Cannon CP, et al. REACH Registry Investigators： Current use of aspirin and antithrombotic agents in the United States among outpatients with atherothrombotic disease (from the REduction of Atherothrombosis for Continued Health [REACH] Registry). Am J Cardiol 105(4)：445-452, 2010 ※図表に関しましては、割愛させていただいております。