Miniature-probe endoscopic ultrasonography using a rubber balloon to evaluate gastrointestinal carcinomas in poor underwater conditions - Kobayashi, Nobuya; Kobara, Hideki; Nishiyama, Noriko; Shi, Tingting; Chiyo, Taiga; Yachida, Tatsuo; Masaki, Tsutomu (Endoscopy, 2021)