- Correspondence to: Professor M Delgado-Rodríguez Division of Preventive Medicine and Public Health, Building B-3, University of Jaen, 23071-Jaén, Spain;
- Accepted 15 November 2003
- Published online 13 July 2004.
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.