Battat R, Kopylov U, Szilagyi A, Saxena A, Rosenblatt DS, Warner M, Bessissow T, Seidman E, Bitton A.  
2014.  
Vitamin B12 deficiency in inflammatory bowel disease: prevalence, risk factors, evaluation, and management.. Inflamm Bowel Dis. 20(6):1120-8.