- Correspondence to: Dr H A Weiss MRC Tropical Epidemiology Group, Infectious Disease Epidemiology Unit, Keppel Street, London WC1E 7HT, UK;
- Accepted September 27, 2005
- First published March 30, 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.