The following amendments should not typically lead to a protocol being classed as a new citation version, unless the protocol also fulfills one or both of the two criteria in Box 3.2.b. Such changes will result in an amendment to the published protocol, but the existing citation will be maintained.
Changes to the text of the protocol (e.g. the Background section).
Changes in planned methodology.
Changes to the order of existing authors (other than a change in the first author), or deletion of authors.
Corrections.