anchor.diff:      var genesQueried = "";
       var shownHistogram = 1;
       var multipleGenes = <%=multipleGenes%>;
  +    var divideHistograms = <%=divideHistograms%>;
  +    var onlyMutationData = <%=(dataPriority == 1)%>;
       var maxAlterationPercent = 0;
       var lastStudyLoaded = false;
   
  
positive.code:     ArrayList<CancerStudy> cancerStudies = (ArrayList<CancerStudy>)
              request.getAttribute(QueryBuilder.CANCER_TYPES_INTERNAL);
  
      ArrayList<CancerStudy> cancerStudiesWithMutations = new ArrayList<CancerStudy>(),
                             cancerStudiesWithOutMutations = new ArrayList<CancerStudy>();
      for(CancerStudy cancerStudy: cancerStudies) {
          if(cancerStudy.hasMutationData()) {
              cancerStudiesWithMutations.add(cancerStudy);
          } else {
              cancerStudiesWithOutMutations.add(cancerStudy);
          }
      }
  
  
negative.code: 
      ServletXssUtil servletXssUtil = ServletXssUtil.getInstance();
      String geneList = servletXssUtil.getCleanInput(request, QueryBuilder.GENE_LIST);
  
      // Infer whether there is multiple genes or not (for histogram switching)
      int geneCount = 0;
  