Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion. The Burden of Chronic Diseases and Their Risk Factors: National and state perspectives. Atlanta, GA: Centers for Disease Control and Prevention; 2004. http://www.cdc.gov/nccdphp/burdenbook2004/pdf/burden_book2004.pdf
The number of ambulatory medical care visits for hypertension was 55 million in 2009–49,966,000 physician office visits, 1,000,000 emergency department visits, and 4,182,000 outpatient visits.
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