AMA Manual of Style - Stacy L. Christiansen, Cheryl Iverson 2020
Manuscript Preparation for Submission and Publication
Addenda may be material added to an article late in the publication process or material that is considered supplementary to the article. Note: An addendum is distinct from formal supplementary online material, although addenda may sometimes be presented as supplementary online material. For that, see 2.12, Online-Only (Supplementary) Material. For example, in the JAMA Network journals, if material is added late in the publication process, well after a manuscript has been accepted for publication (eg, extended follow-up, data or information on recent legislation or other relevant event, or additional studies that bear on the present article), it is best incorporated in the text as the final paragraph or paragraphs.
Addendum: On January 24, a state district judge ordered John Peter Smith Hospital to grant Mr Muñoz’s wishes and take Ms Muñoz off life support. Life support has since been removed.
The paragraph may be set off by extra space, hairline centered rule, or both, if desired. Any references cited for the first time in this addendum or final paragraph should follow the numbering of the existing reference list.
Note: If substantial material (eg, new figures, new tables, several additional cases) is added after acceptance of the manuscript or the conclusions change after acceptance, the editor must approve all such changes; additional peer review may be required.