[1] Univ Hosp Vrije Univ, Dept Gastroenterol, NL-1081 BT Amsterdam, Netherlands
[2] Univ Hosp Vrije Univ, Lab Gastrointestinal Immunogenet, NL-1081 BT Amsterdam, Netherlands
[3] Univ Hosp Vrije Univ, Dept Clin Genet, NL-1081 BT Amsterdam, Netherlands
[4] NIAID, Mucosal Immun Sect, NIH, Bethesda, MD 20892 USA