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2 July 2008
- 19:25 19:25, 2 July 2008 diff hist +717 Talk:Case–control study No edit summary
- 19:20 19:20, 2 July 2008 diff hist +15 Case–control study Fixed a couple of small problems I caused with the last edit.
- 19:16 19:16, 2 July 2008 diff hist +434 Case–control study Cleaned up some of the explanation in the first half of the article, trying to distinguish between data collection and (secondary) data analysis, and between ecological and other cross-sectional data
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