Need to link in an XML/XSL page

The page in question is  here:wtc.

The title of each article is currently just a static title. I need to make it a link.

Here is the XML that provids the title:

<titles><title><style face="normal" font="default" size="100%">Frequent binge drinking five to six years after exposure to 9/11: Findings from the World Trade Center Health Registry</style></title></titles>

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and here is the XSLT that transforms it for display:

 

<h3><xsl:value-of select="./titles/title/style"/></h3>

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Now, I need to make that title a link by bringing together two separate pieces. One, this url:

http://www.ncbi.nlm.nih.gov/pubmed/

and the ID number from within the specific record's XML to tag on to the end of the URL. Example:

24018914 to make the clickable link as follows:

http://www.ncbi.nlm.nih.gov/pubmed/24018914

The ID number that needs to be tagged onto the URL comes from the XML as follows:

<accession-num><style face="normal" font="default" size="100%">24831753</style></accession-num> (ignore the style. There is nothing I can do about that)

I am attaching a txt record that have a FULL portion of one sample XML record. If someone can please show me the code to make the link work, I would greatly appreciate it.