Show PubMed RSS feed with google feed api

I am trying to add a RSS feed to my website using Google feeds. The problem is that it clips the number of entries. I only see 4 entries, but when i curl the RSS i see 28 entries. How can I have it load the rest of the entries.

<script type="text/javascript" src="https://www.google.com/jsapi"></script><script language="JavaScript">google.load("feeds", "1");function initialize() {    var feed = new google.feeds.Feed("http://eutils.ncbi.nlm.nih.gov/entrez/eutils/erss.cgi?rss_guid=1zYrsILa0sOsmYw2yBRKaeHt9hnGCeczWTLrGvu39KX1g_ZMyr");    feed.load(function(result) {        alert(result.feed.entries);        if (!result.error) {            var container = document.getElementById("feed");            var text = "";            for (var i = 0; i < result.feed.entries.length; i++) {                var entry = result.feed.entries[i];                text += "<a href='"+ entry.link +"'>"+ entry.title +"</a><br />"+ entry.description +"<br /><br />";            }            container.innerHTML = text;        }    });}google.setOnLoadCallback(initialize);</script>

and html

<div id="feed">Loading...</div>