作者单位:Columbia Univ, Coll Phys & Surg, Neurol Inst, Peripheral Neuropathy Ctr, New York, NY USA[1]Karolinska Inst, Dept Med Epidemiol & Biostat, SE-17177 Stockholm, Sweden[2]Columbia Univ, Dept Med, Coll Phys & Surg, Celiac Dis Ctr, New York, NY USA[3]