Diagnosis of early esophageal carcinoma 17 cases and endoscopical examination Makuuchi, H.; Suhihara, T.; Nakasaki, H.; Tajima, T.; Mitomi, T.; Miyoshi, H.; Kumagai, Y.; Yamasaki, E. Journal of the Japan Broncho-Esophagological Society 32(6): 406-412 1981 https://eurekamag.com/research/005/142/005142803.php