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  %w(er_quantitative pr_quantitative p53_quantitative fish_quantitative oncotype_quantitative).each do |field|
    class_eval <<-RUBY
      def #{field}_s
        if #{field}.blank?
          #{field}
        else
          '%d' % #{field}
        end
      end
      def #{field}_s=(val)
        #{field} =
          if #{field}.blank?
            #{field}
          else
            val.to_i
          end
      end
    RUBY
  end