[1] Karolinska Inst, Inst Environm Med, Stockholm, Sweden
[2] Zhejiang Univ, Sch Publ Hlth, Sch Med, Hangzhou, Zhejiang, Peoples R China
[3] Zhejiang Univ, Affiliated Hosp 2, Sch Med, Hangzhou, Zhejiang, Peoples R China
[4] Harvard Med Sch, Celiac Ctr, Beth Israel Deaconess Med Ctr, Boston, MA USA
[5] Uppsala Univ, Dept Surg Sci, Uppsala, Sweden
[6] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[7] Orebro Univ Hosp, Dept Pediat, Orebro, Sweden
[8] Columbia Univ, Med Ctr, Dept Med, Celiac Dis Ctr, New York, NY USA