Park, C. ., Cheon, J. ., Kim, J. ., Shin, J. ., Jang, B. ., Shin, S. ., … Chang, D. . (1969). Criteria for decision making after endoscopic resection of well-differentiated rectal carcinoids with regard to potential lymphatic spread. Endoscopy. https://doi.org/10.1055/s-0030-1256414 (Original work published)