RT Journal Article SR Electronic T1 Gi bleedings identifying the source JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 407 OP 408 VO 61 IS 6 A2 William S. Wilke A1 Loren Laine YR 1994 UL http://www.ccjm.org/content/61/6/407.abstract AB