of the total 199 patients who experienced gastrointestinal bleeding , 95 ( 48 % ) bled from esophageal or gastric varices , 67 ( 34 % ) bled from peptic ulcer or gastritis , and 37 ( 18 % ) had either insufficient evidence of the source ( 33 ) or mixed sources ( 4 ) .
C0017181
gastrointestinal bleeding
C0030922
bled