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William A. Yasnoff, MD, PhD, is Associate Director for Science and Acting Director of the Information Network for Public Health Officials, Public Health Practice Program Office, Centers for Disease Control and Prevention in Atlanta, Georgia. Edward J. Sondik, PhD, is Director of the National Centers for Health Statistics, Centers for Disease Control and Prevention in Hyattsville, Maryland.
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Yasnoff et al. (1999) studied this question.
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