[1] Columbia Univ, Teachers Coll, Dept Hlth & Behav Studies, Program Nutr, 525 West 120th St, New York, NY 10027 USA
[2] Columbia Univ, Irving Med Ctr, Celiac Dis Ctr, Dept Med, 180 Ft Washington Ave,Suite 934,Harkness Pavil, New York, NY 10032 USA
[3] Univ Surrey, Sch Psychol, Dept Psychol Intervent, Guildford GU2 7XH, Surrey, England
[4] Columbia Univ, Irving Med Ctr, Dept Psychiat, 1051 Riverside Dr, New York, NY 10032 USA
[5] Columbia Univ, Teachers Coll, Dept Hlth & Behav Studies, 525 West 120th St, New York, NY 10027 USA
[6] Columbia Univ, Mailman Sch Publ Hlth, Irving Med Ctr, Dept Epidemiol, 722 West 168th St, New York, NY 10032 USA