- Correspondence to: Dr Richard J H Smith Department of Otolaryngology and Head and Neck Surgery, Interdepartmental Genetics Program, The University of Iowa, 200 Hawkins Drive, Iowa City, IA 52242, USA;
- Received March 10, 2005
- Accepted July 4, 2005
- Revised June 30, 2005
- First published July 20, 2005.
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