RT Journal Article SR Electronic T1 A Consideration of the Deficiency Factor in Diseases of the Gastro-Intestinal Tract JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 161 OP 168 VO 3 IS 2 A1 Hartsock, C. L. YR 1936 UL http://www.ccjm.org/content/3/2/161.abstract AB