Usefulness of non-magnifying narrow-band imaging in screening of early esophageal squamous cell carcinoma: A prospective comparative study using propensity score matching

Yasuaki Nagami, Kazunari Tominaga^*, Hirohisa Machida, Masami Nakatani, Natsuhiko Kameda, Satoshi Sugimori, Hirotoshi Okazaki, Tetsuya Tanigawa, Hirokazu Yamagami, Naoshi Kubo, Masatsugu Shiba, Kenji Watanabe, Toshio Watanabe, Hiroyoshi Iguchi, Yasuhiro Fujiwara, Masaichi Ohira, Kosei Hirakawa, Tetsuo Arakawa