the mean ( +/- sd ) basal serum gastric level for chinese controls and chinese patients with duodenal and gastric ulcer were 24-6 pg/ml ( +/- 13.7 pg/ml ) , 18-5 pg/ml ( +/- 8-9 pg/ml ) , and 33-9 pg/ml ( +/- 27-7 pg/ml ) , respectively .
C0038351
gastric
C0038358
gastric ulcer