Intercenter variation in initial management of children with Crohn's disease
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A. Griffiths | K. Kleinman | A. Bousvaros | S. Kugathasan | J. Finkelstein | M. Kappelman | A. Otley | J. Rosh | J. Markowitz | D. Mack | J. Hyams | Jonathan Evans | C. Langton | M. Pfefferkorn | R. Grand