- Correspondence to:
Dr D Anand, FSID Unit of Perinatal and Paediatric Epidemiology, Department of Public Health, Muspratt Building, Liverpool L69 3GB, UK;
- Accepted August 5, 2002
- First published February 1, 2003.
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.