Add references section

templates/index.nj

@@ -37,6 +37,8 @@
       {% include './assessment.nj' %}
 
       {% include './treatment.nj' %}
+
+      {% include './references.nj' %}
     </div>
   </body>
 

templates/references.nj

@@ -0,0 +1,13 @@
+<div class='row'>
+  <div class='column'>
+    <h2>References</h2>
+  </div>
+</div>
+<div class='references row'>
+  <div class='column'>
+    <ol>
+      <li id='ref-1'>{{ "Alcoholic brain damage. (2013). In Crichton, R., & Ward, R. (2013). Metal-based neurodegeneration: from molecular mechanisms to therapeutic strategies. John Wiley & Sons. https://doi.org/10.1002/9781118553480.ch12" | urlize | safe }}</li>
+      <li id='ref-2'>{{ "Global Burden of Disease Collaborative Network. Global Burden of Disease Study 2019 (GBD 2019) Results. Seattle, United States: Institute for Health Metrics and Evaluation (IHME), 2020. Available from http://ghdx.healthdata.org/gbd-results-tool." | urlize | safe }}</li>
+    </ol>
+  </div>
+</div>