Cabeceras laterales

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 <TR><TH>Head1</TH>
  <TD>Item 1</TD> <TD>Item 2</TD> <TD>Item 3</TD></TR>
 <TR><TH>Head2</TH>
  <TD>Item 4</TD> <TD>Item 5</TD> <TD>Item 6</TD></TR>
 <TR><TH>Head3</TH>
  <TD>Item 7</TD> <TD>Item 8</TD> <TD>Item 9</TD></TR>
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