Real-time visualization of the gastrointestinal tract during nasogastric tube placement: Pilot study of new video-Assisted system - Yi-Ning Lo; Jui-Wen Kang; Chih-Cheng Hsieh; Chiung-Zuei Chen; Kai-Chun Yang; Wei-Chu Tsai; Hsueh-Chien Chiang; Chien-Cheng Chen; I-Cheng Shih; Po-Jun Chen; Er-Hsiang Yang; Hsin-Yu Kuo; et al. (Endoscopy International Open)