diff --git a/source/frontmatter.ptx b/source/frontmatter.ptx
index e5caa11..5866a9c 100644
--- a/source/frontmatter.ptx
+++ b/source/frontmatter.ptx
@@ -59,12 +59,6 @@
           </p>
         </li>
 
-        <li permid="XXu">
-          <p permid="hrg">
-            Simon King, University of Jena*
-          </p>
-        </li>
-
         <li permid="XXu">
           <p permid="hrg">
             Vartuyi Manoyan, Wright College
@@ -89,18 +83,6 @@
           </p>
         </li>
 
-        <li permid="XXu">
-          <p permid="hrg">
-            Soma Dey, Wright College*
-          </p>
-        </li>
-
-        <li permid="XXu">
-          <p permid="hrg">
-            Sydney Hart, Wright College*
-          </p>
-        </li>
-
         <li permid="XXu">
           <p permid="hrg">
             Ted Jankowski, Wright College