- Correspondence to: Dr Juan Carlos Cancino-Díaz Departamento de Microbiología, Laboratorio de Microbiología General, Escuela Nacional de Ciencias Biológicas, Carpio y Plan de Ayala s/n, México, DF, 11340, México;
- Accepted December 1, 2004
- First published June 17, 2005.
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.