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This excerpt taken from the WBMD 10-K filed Mar 16, 2006. DEFINITIONS
OF CERTAIN MEASURES OF USAGE OF THE WEBMD HEALTH
NETWORK
In this Annual Report, we provide information regarding usage of
The WebMD Health Network that we have determined using
internal technology that identifies and monitors usage by
individual computers. As used in this Annual Report:
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Third party services that measure usage of Internet sites may
provide different usage statistics than those reported by our
internal tracking technology. These discrepancies may occur as a
result of differences in methodologies applied and differences
in measurement periods. For example, third party services
typically apply their own proprietary methods of calculating
usage, which may include surveying users and estimating site
usage based on surveys, rather than based upon our internal
tracking technology. Regardless of the measure of usage, if
usage data is prepared using a consistent methodology between
measurement periods, we believe that it provides useful
information over time.
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