anchor.diff:          <c:if test="${gene.embryoDataAvailable}">
               <a class="btn" href="${drupalBaseUrl}/embryoviewer?mgi=${acc}">Embryo Viewer</a>
           </c:if>
  -        
  +
           <c:if test="${hasVignette}">
               <%-- <a class="btn" href="${baseUrl}/embryo/vignettes#${acc}">Embryo Vignette</a> --%>
           </c:if>
  
positive.code:     </div>
    </div>
  
  </c:if>
negative.code: 
        <c:if test="${!attemptRegistered}">
          <div class="alert alert-info">
            <h5>Not currently registered for phenotyping</h5>
  
            <p>Phenotyping is currently not planned for a knockout strain of this gene.
            </p>
          </div>
        </c:if>
        <br/>
  