diff --git a/DESCRIPTION b/DESCRIPTION
index bb6c14b9..a74f7569 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,5 +1,5 @@
 Package: AMR
-Version: 0.6.1.9036
+Version: 0.6.1.9037
 Date: 2019-05-23
 Title: Antimicrobial Resistance Analysis
 Authors@R: c(
diff --git a/R/first_isolate.R b/R/first_isolate.R
index 8c6637c2..ea5f2080 100755
--- a/R/first_isolate.R
+++ b/R/first_isolate.R
@@ -463,8 +463,8 @@ first_isolate <- function(x,
     suppressWarnings(
       all_first <- all_first %>%
         mutate(key_ab_lag = lag(key_ab)) %>%
-        mutate(key_ab_other = !key_antibiotics_equal(x = key_ab,
-                                                     y = key_ab_lag,
+        mutate(key_ab_other = !key_antibiotics_equal(y = key_ab,
+                                                     z = key_ab_lag,
                                                      type = type_param,
                                                      ignore_I = ignore_I,
                                                      points_threshold = points_threshold,
diff --git a/docs/LICENSE-text.html b/docs/LICENSE-text.html
index c15316ee..c91683cf 100644
--- a/docs/LICENSE-text.html
+++ b/docs/LICENSE-text.html
@@ -78,7 +78,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>
 
diff --git a/docs/articles/index.html b/docs/articles/index.html
index 8dfd7c23..67c9e645 100644
--- a/docs/articles/index.html
+++ b/docs/articles/index.html
@@ -78,7 +78,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>
 
diff --git a/docs/authors.html b/docs/authors.html
index 2e522f8d..6d21c135 100644
--- a/docs/authors.html
+++ b/docs/authors.html
@@ -78,7 +78,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>
 
diff --git a/docs/index.html b/docs/index.html
index a10d4e13..1795c31d 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -42,7 +42,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>
 
diff --git a/docs/news/index.html b/docs/news/index.html
index bb653856..24106e2c 100644
--- a/docs/news/index.html
+++ b/docs/news/index.html
@@ -78,7 +78,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>
 
diff --git a/docs/reference/index.html b/docs/reference/index.html
index 18f7aba4..13347a52 100644
--- a/docs/reference/index.html
+++ b/docs/reference/index.html
@@ -78,7 +78,7 @@
       </button>
       <span class="navbar-brand">
         <a class="navbar-link" href="../index.html">AMR (for R)</a>
-        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9036</span>
+        <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">0.6.1.9037</span>
       </span>
     </div>