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| created at |
2017-12-23 06:35:07 UTC |
| updated at |
2017-12-26 02:52:44 UTC |
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1 layer
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418,375 entries
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There is 0 pattern entry.
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intervention trial
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PROC |
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intervention trials
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prevention trials
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prevention trial
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Intervention Trial
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general population survey
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survey by area covered
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time series study
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family, adoption, or twin study
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assignment of study subjects to conditions
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assignment of subjects to study conditions
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random assignment
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controlled vs uncontrolled study
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follow-up design
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multistage sampling design
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