Vitamin B12 and folic acid in Crohn's disease.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003424:Crohn Disease / Q000150:complications*; D005260:Female; D005494:Folic Acid Deficiency / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D014806:Vitamin B 12 Deficiency / Q000209:etiology