More recent abstract:
http://apt.allenpress.com/aptonline/?request=get-abstract&issn=0891-6640&volume=018&issue=04&page=0477 <http://apt.allenpress.com/aptonline/?request=get-abstract&issn=0891-6640&volume=018&issue=04&page=0477>
Scientific Discussion http://www.emea.eu.int/vetdocs/PDFs/EPAR/virbagenomega/108501en6.pdf
