Inoki, Kazuya, Masayoshi Yamada, Hiroki Kuwabara, Hiroyuki Takamaru, Masau Sekiguchi, Taku Sakamoto, Takahisa Matsuda, and Yutaka Saito. “Newly-Developed Colonoscope (PCF-PQ260L) Is Useful for Patients With Difficult Colons”. Turkish Journal of Gastroenterology 30, no. 7 (January 7, 2019): 630–635. Accessed January 1, 2026. https://www.turkjgastroenterol.org/index.php/tjg/article/view/3445.