Update elsevier-vancouver-author-date.csl

POBrien333 · web-flow · commit 1e2c3ada9bd1 · 2019-10-15T17:11:07.000+02:00
closes #4341
diff --git a/elsevier-vancouver-author-date.csl b/elsevier-vancouver-author-date.csl
@@ -75,7 +75,7 @@
   <macro name="access">
     <choose>
       <if variable="DOI">
-        <text variable="DOI" prefix="doi:"/>
+        <text variable="DOI" prefix="https://doi.org/"/>
       </if>
       <else-if type="webpage post-weblog" match="any">
         <choose>
