| Date | Event | Description |
|---|---|---|
| 6 January 2020 | New citation required but conclusions have not changed | Two new studies were added; one suggested adults may have improved survival time with intravenous immunoglobulin (IVIG); one reported no therapeutic efficiency for use of IGIV in children. One quasi‐randomised study that was previously included was removed. |
| 2 July 2019 | New search has been performed | Search was updated to July 2019. |
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