Hydrogel spacer injection to the meso-sigmoid to protect the sigmoid colon in cervical cancer brachytherapy: A technical report - Sakuramachi, Madoka; Murakami, Naoya; Nagao, Ayaka; Kojima, Kanako; Miyata, Yusaku; Kashihara, Tairo; Kaneda, Tomoya; Takahashi, Kana; Inaba, Koji; Okuma, Kae; Nakayama, Yuko; Okamoto, Hiroyuki; et al. (Journal of Contemporary Brachytherapy, 2023)