diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index a764ec3f0..6bfc22458 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -1627,17 +1627,6 @@ Zotero.Utilities = {
 			cslItem.title = Zotero.Notes.noteToTitle(zoteroItem.note);
 		}
 		
-		// extract PMID
-		var extra = zoteroItem.extra;
-		if(typeof extra === "string") {
-			var m = /(?:^|\n)PMID:\s*([0-9]+)/.exec(extra);
-			if(m) cslItem.PMID = m[1];
-			m = /(?:^|\n)PMCID:\s*((?:PMC)?[0-9]+)/.exec(extra);
-			if(m) cslItem.PMCID = m[1];
-			m = /(?:^|\n)DOI:\s*(10\.[0-9]{4,}\/[^\s]*[^\s\.,])/.exec(extra);
-			if(m) cslItem.DOI = m[1];
-		}
-		
 		//this._cache[zoteroItem.id] = cslItem;
 		return cslItem;
 	},