[1] Univ Med Ctr Nijmegen, Dept Internal Med, NL-6500 HB Nijmegen, Netherlands
[2] Univ Med Ctr Nijmegen, Dept Gastroenterol, NL-6500 HB Nijmegen, Netherlands
[3] Univ Indonesia, Reg Ctr Community Nutr, SE Asian Minist Educ Org Trop Med, Jakarta, Indonesia
[4] Univ Indonesia, Fac Med, Working Grp Infect Dis, Jakarta, Indonesia
[5] Univ Wageningen & Res Ctr, Div Human Nutr & Epidemiol, NL-6700 HB Wageningen, Netherlands