Gel immersion endoscopic ultrasonography for ampullary tumors.
Haruka ToyonagaToshifumi KinKosuke IwanoRisa NakamuraTatsuya IshiiKuniyuki TakahashiTusyoshi HayashiSatoshi OtaToshiya ShinoharaAkio KatanumaPublished in: Journal of hepato-biliary-pancreatic sciences (2022)