SubHead1 = H2
This is the main subheading and should be the first used as a level below the H1, which is the page title.
SubHead2 = H3
This is the secondary subheading, and should only be used when the subject matter that follows it is encompassed by a larger topic that has been denoted by subhead 1 (H2).
SubHead3 = H4
This is the third level subheading, and should only be used when the content is a sub-topic of a preceeding subhead 2 (h3).
Medically reviewed by: Sally S. Elias, MD
Date reviewed: July 2022