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 Date: 2014-08-25 13:35:51Methodology Evaluation methods Research methods Research Response rate Behavioral Risk Factor Surveillance System U.S. Cellular Telephone Ringtone Science Technology Sampling |
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Date: 2014-08-25 13:35:51Methodology Evaluation methods Research methods Research Response rate Behavioral Risk Factor Surveillance System U.S. Cellular Telephone Ringtone Science Technology Sampling |
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2013 Summary Data Quality Report