 even' valign='top'>
    <td class='relatedTable detail' title="drug_strength.drug_concept_id refs concept.concept_id via fpk_drug_strength_concept_1"><a href='concept.html'>concept</a><span class='relatedKey'>.concept_id</span>
    </td>
    <td class='constraint detail'>fpk_drug_strength_concept_1<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 Concept in the CONCEPT table representing