[1] Leiden Univ, Med Ctr, Dept Human & Clin Genet, MGC, NL-2300 RA Leiden, Netherlands
[2] Leiden Univ, Med Ctr, Dept Pathol, NL-2300 RA Leiden, Netherlands
[3] Leiden Univ, Med Ctr, Fdn Detect Hereditary Tumors, NL-2300 RA Leiden, Netherlands
[4] Leiden Univ, Med Ctr, Dept Gastroenterol, NL-2300 RA Leiden, Netherlands
[5] Norwegian Radium Hosp, Unit Med Genet, Oslo, Norway
[6] Erasmus Univ, Dept Clin Genet, MGC, NL-3000 DR Rotterdam, Netherlands
[7] Free Univ Amsterdam Hosp, Dept Clin Genet, Amsterdam, Netherlands
[8] Univ Dusseldorf, Dept Surg, D-4000 Dusseldorf, Germany
[9] Leiden Univ, Med Ctr, Clin Genet Ctr Leiden, NL-2300 RA Leiden, Netherlands
[10] Univ Groningen, Dept Med Genet, Groningen, Netherlands