RT Journal Article SR Electronic T1 Ulcerative colitis in children and adolescents from the Western Region of Saudi Arabia JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 217 OP 217 VO 33 IS 2 A1 Mahmood D. Al-Mendalawi YR 2012 UL http://smj.org.sa/content/33/2/217.abstract AB