- Correspondence to: Dr C A Johnson, Section of Medical and Molecular Genetics, Department of Paediatrics and Child Health, University of Birmingham Medical School, Birmingham B15 2TT, UK;
- Received March 1, 2003
- Accepted March 3, 2003
- First published June 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.