Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
RIDELL R. H.,Value of sigmoidoscopy and biopsy in detection of carcinoma and premalignant change in ulcerative colitis,Gut,,,1979,20,,575-580,https://cir.nii.ac.jp/crid/1570572701446783872,https://doi.org/10.1136/gut.20.7.575