| Date | Event | Description |
|---|---|---|
| 19 June 2015 | Amended | Minor edit to Plain Language Summary for clarification. Missing referee name added to Acknowledgements. |
| 2 February 2015 | Amended | Background updated to justify the need for the review. Change to risk of bias domains, incorporating an item on 'sampling' Change to the handling of missing data; imputation of missing standard deviations for DMFT and dmft data |
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