“…The results of this test are comparable with these obtained from radiology and endoscopy, and are superior to the reported results of exfoliative cytology (Cabre-Fiol, Olo-Garcia, and Vilardell, 1959;Burnett, Macfarlane, Park, and Kay, 1960;Brandborg, Taniguchi, and Rubin, 1961). The test is easy to perform clinically and entails little discomfort to the patient.…”