Histologic Correlates of Clinical and Endoscopic Severity in Children Newly Diagnosed With Ulcerative Colitis.

Boyle B, Collins MH, Wang Z, Mack D, Griffiths A, Sauer C, Markowitz J, LeLeiko N, Keljo D, Rosh J, Baker SS, Pfefferkorn M, Heyman M, Patel A, Baldassano R, Noe J, Rufo P, Kugathasan S, Walters T, Denson L, Hyams J, PROTECT Study Group