<b>Close relationships</b><span class='degrees' id='degrees' title='Detail diminishes with increased separation from drug_exposure'>
&nbsp;within <label for='oneDegree'><input type='radio' name='degrees' id='oneDegree' checked>one</label>  <label for='twoDegrees'><input type='radio' name='degrees' id='twoDegrees'>two degrees</label> of separation</span><b>:</b></form>
<map id="oneDegreeRelationshipsDiagram" name="oneDegreeRelationshipsDiagram">
<area shape="rect" id="node1" href="drug_exposure.html" title="