in 66 endoscopic duodenal biopsies studied retrospectively and in 84 paired duodenal and antral biopsies assessed prospectively campylobacter like organisms were seen in 22 ( 33 % ) of the retrospectively examined duodenal biopsies and in 61 ( 73 % ) examined prospectively , and in 70 ( 83 % ) of antral biopsies .
C0013303
duodenal
C0399805
duodenal biopsies