Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.
Funding This project was supported by the Instituto de Salud Carlos III, FIS (PI07-0045, PI 06-0547, PI07-90512), CIBERER, CIBERNED and Diputación General de Aragón (B33 and PI063-2007).
Ethics approval This study was conducted with the approval of the Gobierno de Aragón (Aragon Government).
Provenance and peer review Not commissioned; externally peer reviewed.