| Date | Event | Description |
|---|---|---|
| 20 November 2015 | Feedback has been incorporated | Protocol revised according to editor's comments. |
| 8 July 2015 | Amended | Final version of protocol for editorial approval |
| 30 June 2015 | Amended | Final draft of protocol prepared for editorial approval. |
| 31 January 2015 | Amended | Started first draft of protocol |
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