- Correspondence to: Dr J-E S Hansen, Centre for Rare Diseases and Disabilities, Bredgade 25, 1260 Copenhagen K, Denmark;
- Accepted August 28, 2001
- Revised August 28, 2001
- First published April 1, 2002.
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.