論文（英文）
Kuwatani M, Kawakami H, Hayashi T, Eto K, Yamato H, Onodera M, Naruse H, Oba K. Effect of antispasmodic drugs on endoscopic ultrasound/endoscopic ultrasound-guided fine-needle aspiration: A multicenter randomized controlled trial. Endoscopic Ultrasound 2014; 3: 167-73.
Kuwatani M, Kawakami H, Hayashi T, Eto K, Yamato H, Onodera M, Naruse H, Oba K. Effect of antispasmodic drugs on endoscopic ultrasound/endoscopic ultrasound-guided fine-needle aspiration: A multicenter randomized controlled trial. Endoscopic Ultrasound 2014; 3: 167-73.