- Correspondence to Dr Heather C Mefford, Department of Pediatrics, Division of Genetic Medicine, University of Washington, 1959 NE Pacific Street, Box 356320, Seattle, Washington DC 98195, USA;
- Received September 27, 2011
- Revised November 18, 2011
- Accepted November 23, 2011
- First published December 17, 2011.
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