/td>
<td align="left">Compute a common shared environment matrix</td>
</tr>
<tr class="even">
<td align="left">drop1.geeglm</td>
<td align="left">Drop All Possible Single Terms to a geeglm Model Using Wald or Score Test</td>
</tr>
<tr class="odd">
<td align="left">drop1.geem</td>
<td align="left">Drop All Possible Single Terms to a geem Model Using Wald or Score Test</td>
</tr>
<tr class="even">
<td align="left">extended.shared</td>
<td align="left">Compute a common shared environment matrix</td>
</tr>
<tr 