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   Kodai SHINGAKI et al, 2023, Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association) CrossRef
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   Terumi Kamisawa et al, 2008, World Journal of Gastroenterology CrossRef
3. How Can We Manage Gallbladder Lesions by Transabdominal Ultrasound?
   Shinji Okaniwa, 2021, Diagnostics CrossRef