Health Butler's health information is derived from material published by a number of reliable government sources including the National Institutes of Health (NIH), Centers for Disease Control and Prevention (CDC), U.S. Department of Health and Human Services, and various independent organizations including the American Cancer Society (ACS), American Heart Association (AHA), and others. Citations are provided at the bottom of every page containing referenced information. Our goal is to provide you with the clearest, most concise descriptions of research-supported screening procedures, immunizations, and other preventive healthcare measures. Make wellness a priority by taking control of your own preventive care.

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