spontaneous healing under such conditions occurred in the present study in 37 % of gastric , and 45 % of duodenal , ulcers , while in patients taking ranitidine 62 % of gastric ( p less than 0.05 ) and 82 % of duodenal ulcers ( p less than 0.01 ) were cicatrized after 3 weeks .
C0034665
ranitidine
C0013295
duodenal ulcers