<?xml version="1.0" encoding="UTF-8"?>
<!-- Deliberately empty. Every prerendered page on this subdomain is
     noindex,follow because www.arrowheadcorp.com owns indexing for the
     product. This file exists only so the URL serves valid XML: without it,
     the SPA fallback rewrite answers /sitemap.xml with HTML and HTTP 200,
     which a crawler that registered the sitemap historically would treat as
     a broken sitemap forever. -->
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"></urlset>
