anchor.diff:            <b>NCI Thesaurus (NCIt)</b> is an extensive reference terminology
             with some complex features.  Each specific meaning, such as melanoma,
             lung, or chemotherapy, is represented by a distinct <i>concept</i>
  -          with a unique, permanent <i>code</i>.  Each concept provides 
  +          with a unique, permanent <i>code</i>.  Each concept provides
             additional information such as a preferred name, other terms
  -          and codes, definitions, and relationships with other concepts.  
  +          and codes, definitions, and relationships with other concepts.
             Concepts are organized within major categories,
             such as anatomy and gene, and arranged in logical parent-child
             hierarchies from very broad top concepts down to the most
  
positive.code:             <td><h2><A NAME="additionalinfo">Additional Information</A></h2></td>
              <td align="right"><a href="#"><img src="<%= request.getContextPath() %>/images/up_arrow.jpg" width="16" height="16" border="0" alt="top" /></td>
            </tr></table>
            
            Additional information about NCIt and EVS can be found on the <a href="http://evs.nci.nih.gov/" target="_blank" alt="EVS">EVS Web</a> and <a href="https://wiki.nci.nih.gov/display/EVS/EVS+Wiki" target="_blank" alt="EVS Wiki sites">EVS Wiki sites</a>. 
            </br>Several journal articles describe NCIt in greater detail; these are listed in the <a href="http://evs.nci.nih.gov/aboutEVS" target="_blank" alt="About EVS">About EVS</a> page on the EVS Web site.
          </p>
          <br>
  
negative.code:               <li>Click on the preferred name to see a concepts details.</li>
              </ul>
          </p>
  
          <p class="textbody">
            <table width="100%" cellpadding="0" cellspacing="0" border="0"><tr>
              <td><h2><A NAME="conceptdetails">Concept Details</A></h2></td>
  