Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MOERTEL CG,Carcinoembryonic antigen test for recurrent colorectal carcinoma. Inadequacy for early detection,JAMA,,,1978,239,,1065-1066,https://cir.nii.ac.jp/crid/1570572700836444672,