anchor.diff:  </table>
   
   <c:forEach var="experimentalFactor" items="${differentiallyExpressedFactors}" varStatus="i" begin="6">
  -    <c:if test="${ef==null}">
  +    <c:if test="${empty ef}">
           <div class="geneAnnotHeader">${f:escapeXml(atlasProperties.curatedEfs[experimentalFactor.name])}</div>
       </c:if>
       studied in
       <c:forEach var="experiment" items="${experimentalFactor.experiments}" varStatus="i_e">
  -        <c:if test="${(i_e.index<5)||(ef!=null)}">
  +        <c:if test="${(i_e.index<5)||(not empty ef)}">
               <a href="${pageContext.request.contextPath}/experiment/${experiment}/${atlasGene.geneIdentifier}">${experiment}</a><c:if
                   test="${!i_e.last}">, </c:if>
           </c:if>
           <c:if test="${i_e.last}">
  -            <c:if test="${(i_e.count>=5)&&(ef==null)}">
  +            <c:if test="${(i_e.count>=5)&&(empty ef)}">
                   ... (${i_e.count} experiments)
               </c:if>
           </c:if>
       </c:forEach>
  -    <c:if test="${ef==null}">
  +    <c:if test="${empty ef}">
           <div style="font-size:10px;">
               <a href="${pageContext.request.contextPath}/gene/${atlasGene.geneIdentifier}?ef=${experimentalFactor.name}">show
                   this factor only&gt;&gt;</a>
  
positive.code: 
  
                  <div style="padding-left:0px">
                      <c:if test="${(experimentalFactor.moreValuesCount>0)&&(ef==null)}">
                          ${experimentalFactor.moreValuesCount} more value(s).
                      </c:if>
                      <c:if test="${ef==null}">
                          <div style="font-size:10px;">
                              <a href="${pageContext.request.contextPath}/gene/${atlasGene.geneIdentifier}?ef=${experimentalFactor.name}">show
                                  this factor only&gt;&gt;</a>
  
negative.code:                 </c:forEach>
                  -->
  
                  <c:if test="${empty ef}">
                      <div style="padding-left:0px; font-size:10px;">
                         <c:choose>
                             <c:when test="${experimentalFactor.name != 'organism_part'}">
  