Example table with multiple thead elements with consistent style

The example uses multiple tgroup elements and multiple thead elements and demonstrates where tgroups are needed when multiple theads appear with the same style.
media/489410_image46.png
The example:
Uses four tgroups and four theads
Uses two rows in the first thead (Component, Disease association, Complement profile; Early classical pathway components)
Contains some theads that span three columns
XML


      <table id="med-9780199204854-chapter-1-table-25" colsep="0" rowsep="0">
        <titleGroup><title>
 <p>
                     <enumerator>Table 5.1.2.3</enumerator> Examples of complete hereditary deficiency,
              disease association and typical complement profile</p></title>
        </titleGroup>
        <tgroup cols="3"><colspec colnum="1" colname="col1"/><colspec colnum="2" colname="col2"/><colspec colnum="3" colname="col3"/><thead>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>Component</p>
   </entry>
   <entry colname="col2" align="left">
     <p>Disease association</p>
   </entry>
   <entry colname="col3" align="left">
     <p>Complement profile</p>
   </entry>
 </row>
 <row rowsep="1">
   <entry namest="col1" nameend="col3" align="left">
     <p>Early classical pathway components</p>
   </entry>
 </row></thead><tbody>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>C1q, C1r, C1s, C4 and C2</p>
   </entry>
   <entry colname="col2" align="left">
     <p>SLE pyogenic infections including meningitis (many C2-deficient cases
                  healthy)</p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-300">
             <p>C3 = normal or increased</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-301">
             <p>C4 = normal or increased</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-302">
             <p>(C4 = 0 in C4-deficient patients)</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-303">
             <p>CH50 = 0</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-304">
             <p>AP50 = normal</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row></tbody>
        </tgroup>
        <tgroup cols="3"><thead>
 <row rowsep="1">
   <entry namest="col1" nameend="col3" align="left">
     <p>
                             <b>Alternative pathway components</b>
                         </p>
   </entry>
 </row></thead><tbody>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>Factor B<xrefGrp role="tableNote">
                                 <xref ref="med-9780199204854-chapter-1-note-050102003">
                                     <sup>a</sup>
                                 </xref>
                             </xrefGrp>
                  and factor D</p>
   </entry>
   <entry colname="col2" align="left">
     <p>
                             <i>Neisserial</i> infections</p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-305">
             <p>C3 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-306">
             <p>C4 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-307">
             <p>CH50 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-308">
             <p>AP50 = 0</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>Properdin (X-linked)</p>
   </entry>
   <entry colname="col2" align="left">
     <p>Recurrent <i>Neisserial</i> infection; rarely pyogenic infection</p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-309">
             <p>C3 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-310">
             <p>C4 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-311">
             <p>CH50 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-312">
             <p>AP50 = low or normal</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>C3</p>
   </entry>
   <entry colname="col2" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-313">
             <p>Recurrent pyogenic infection</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-314">
             <p>MPGN</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-315">
             <p>C3 = 0</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-316">
             <p>C4 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-317">
             <p>CH50 = 0</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-318">
             <p>AP50 = 0</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row></tbody>
        </tgroup>
        <tgroup cols="3"><thead>
 <row rowsep="1">
   <entry namest="col1" nameend="col3" align="left">
     <p>
                             <b>Lectin pathway components</b>
                         </p>
   </entry>
 </row></thead><tbody>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>MBL</p>
   </entry>
   <entry colname="col2" align="left">
     <p>Recurrent pyogenic infections particularly in childhood</p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-319">
             <p>C3 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-320">
             <p>C4 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-321">
             <p>CH50 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-322">
             <p>AP50 = normal</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row></tbody>
        </tgroup>
        <tgroup cols="3"><thead>
 <row rowsep="1">
   <entry namest="col1" nameend="col3" align="left">
     <p>
                             <b>Terminal pathway components</b>
                         </p>
   </entry>
 </row></thead><tbody>
 <row rowsep="1">
   <entry colname="col1" align="left">
     <p>C5, C6, C7, C8, and C9</p>
   </entry>
   <entry colname="col2" align="left">
     <p>Neisserial infection many C9-deficient cases healthy</p>
   </entry>
   <entry colname="col3" align="left">
     <p>
       <list class="other">
         <list1 listType="unstructured">
           <item1 id="med-9780199204854-chapter-1-item1-323">
             <p>C3 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-324">
             <p>C4 = normal</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-325">
             <p>CH50 = 0</p>
           </item1>
           <item1 id="med-9780199204854-chapter-1-item1-326">
             <p>AP50 = 0</p>
           </item1>
         </list1>
       </list>
     </p>
   </entry>
 </row></tbody>
        </tgroup>
      </table>