il_id</span>
    </td>
    <td class='constraint detail'>fpk_drug_visit_detail<span title='Restrict delete:
 Parent cannot be deleted if children exist'>&nbsp;R</span></td>
   </tr>
  </table>
 </td>
 <td class='comment detail'>A foreign key to the visit in the VISIT_DETAIL table during which the Drug Exposure was initiated.</td>
</tr>
<tr class='odd'>
 <td class='detail'>drug_source_value</td>
 <td class='detail'>varchar</td>
 <td class='detail' align='right'>50</td>
 <td class='detail' align='center' titl