The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader).

If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

Alternatively, you can download the PDF file directly to your computer, from where it can be opened using a PDF reader. To download the PDF, click the Download link above.

Fullscreen Fullscreen Off

Article Metrics

Metrics Loading ...

Metrics powered by PLOS ALM
Bookmark and Share
Copyright (c) 2012 Juan Carlos Checa Olmos, Ángeles Arjona Garrido, Rodrigo Pardo, Noemi García-Arjona