Author Notes
Capture notes about contributors in an <author-notes>
element.
The <author-notes> element may contain child
<fn> elements for contributor footnotes.
Each <fn> element must have a @id attribute which
contains a unique identifier for the note which is used for linking to the relevant
contributor(s) (see Contributor Cross References).
If the <fn> is labeled it must contain a
<label> containing the relevant label text.
Example
<author-notes> <fn id="njpacd8e4afn1"> <label>3</label> <p>Author to whom any correspondence should be addressed.</p> </fn> </author-notes>