the number of gastrin-immunoreactive cells in the duodenum was assessed by immunohistochemistry in 10 dogs that had been subjected to antrectomy with gastroduodenostomy ( billroth i ) , in 4 dogs in which an antrectomy with gastrojejunostomy ( billroth ii ) had been performed and in 4 unoperated controls .
C0013303
duodenum
C0192440
billroth i