Summary (Medical Textbooks)
Some Medical Textbook chapters (and potentially Medical Textbook parts) begin with a summary. Capture this summary in the chapterFrontMatter element within a div1 role="summary" element.
Example
<chapterFrontMatter id="med-9780198566236-chapter-5-chapterFrontMatter-1">
<textMatter><div1 id="med-9780198566236-chapter-5-div1-1" role="summary">
<titleGroup>
<title>
<p>Summary</p>
</title>
</titleGroup>
<p>Peripheral arterial disease (PAD) is a disorder of the peripheral arteries...</p></div1>
</textMatter>
</chapterFrontMatter>