diff --git a/app/models/cancerpredictfields.rb b/app/models/cancerpredictfields.rb
index 3661bcb..3f6b76f 100644
--- a/app/models/cancerpredictfields.rb
+++ b/app/models/cancerpredictfields.rb
@@ -208,12 +208,12 @@ class Cancerpredictfields
     @years = self.years
     # @head_name = ['Treatment','Additional_Benefit','Overall_Survival']
     @head_name = ['Treatment','Overall_Survival']
-    @table_head = @head_name.map{|name| I18n.t('cancerpredict.table.'+name)}
     @therapy_names = self.treatment_method
     I18n.available_locales.each do |locale|
       I18n.with_locale(locale) do
+        @table_head = @head_name.map{|name| I18n.t('cancerpredict.table.'+name)}
         @therapy_choices = [I18n.t('cancerpredict.table.Surgeryonly')]
-        self.form_show_in_result.values.each{|choice| @therapy_choices.push choice["name"][locale]}
+        self.form_show_in_result.values.each{|choice| @therapy_choices.push choice["name"][locale].to_s}
         tmp_table = "<span class=\"result_title print_only\">#{I18n.t("cancerpredict.table.table")}</span><div style=\"clear: both\"></div>"
         tmp_table += '<input id="current_year" type="hidden" value="'+@years[0].to_s+'" index="0"/><p id="cancer_table_texts">'+self.table_above_texts[locale].to_s+'</p>'
         tmp_table += ('<a style="display: inline-block;">'+(locale.to_s == 'zh_tw' ? '第' : '')+'</a><a style="display: inline-block;">')
@@ -234,7 +234,7 @@ class Cancerpredictfields
         @texts = @texts.split('{{years}}')
         @texts.delete('')
         tmp_text = "<span class=\"result_title print_only\">#{I18n.t("cancerpredict.table.text")}</span><div style=\"clear: both\"></div>"
-        tmp_text += ('<span>'+@texts[0])
+        tmp_text += ('<span>'+@texts[0].to_s)
         @years.each{|year| tmp_text += ('<button class="cancer_years cancer_table_btn  btn btn-default btn-sm" style="float:none;">'+year.to_s+'</button>')}
         if @texts.count > 1
           tmp_text +=  (@texts[1]+'</span>') if @texts.count > 1
@@ -251,7 +251,7 @@ class Cancerpredictfields
           @surgery_only_texts = ''
         end
         tmp_text += @surgery_only_texts
-        tmp_text += '<span class="addition">'+self.extra_texts[locale]+'</span><div class="extra-text" style="display:none;"><div class="texts_show" style="clear:both;"></div></div></p>'
+        tmp_text += '<span class="addition">'+(self.extra_texts[locale].to_s rescue '')+'</span><div class="extra-text" style="display:none;"><div class="texts_show" style="clear:both;"></div></div></p>'
         tmp_text_translations[locale] = tmp_text
       end
     end