- Correspondence to Professor Dr Hans F A Vasen, Dutch Hereditary Cancer Registry & Department of Gastroenterology, Leiden University Medical Centre, Rijnsburgerweg 10, Leiden 2333 AA, The Netherlands;
- Received 17 December 2012
- Revised 15 January 2013
- Accepted 16 January 2013
- Published online 21 February 2013.
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