- Correspondence to: Dr K Jáuregui-Renaud Unidad de Investigación Medica, HG Centro Medico Nacional La Raza, IMSS, Av Vallejo y Jacarandas Colonia La Raza, CP 02990, Mexico;
- Received July 5, 2005
- Accepted February 2, 2006
- Revised February 1, 2006
- First published February 7, 2006.
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.