Information concerning how and with whom to correspond about an article.
Any combination of:
Text, numbers, or special characters
<addr-line> Address Line
<country> Country: in an Address
<fax> Fax Number: in an Address
<institution> Institution Name: in an Address
<phone> Phone Number: in an Address
<email> Email Address
<ext-link> External Link
<uri> Uniform Resource Indicator (URI)
<bold> Bold
<italic> Italic
<monospace> Monospace Text (Typewriter Text)
<overline> Overline
<roman> Roman
<sans-serif> Sans Serif
<sc> Small Caps
<strike> Strike Through
<underline> Underline
<label> Label (of an Equation, Figure, Reference, etc.)
<named-content> Named Special (Subject) Content
<styled-content> Styled Special (Subject) Content
<sub> Subscript
<sup> Superscript