- Correspondence to: Dr H F A Vasen Department of Gastroenterology, Leiden University Medical Centre & The Netherlands Foundation for the Detection of Hereditary Tumours, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands;
- Received 8 January 2007
- Accepted 14 February 2007
- Revised 12 February 2007
- Published online 5 June 2007.
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