| Date | Event | Description |
|---|---|---|
| 19 November 2018 | New citation required and conclusions have changed | Conclusions unchanged for outcomes included in the previous version New conclusions provided for new outcomes, along with new comparisons |
| 19 November 2018 | New search has been performed | Review updated in 2018 by new authors: Joanne Guay and Sandra Kopp Methodology updated 38 new trials included; 3 new comparisons and 3 outcomes (duration of tracheal intubation, pain, haemodynamic support requirements) added |
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