1. Endoscopic Ultrasonography-Guided Fine Needle Aspiration for Extrahepatic Cholangiocarcinoma: A Safe Tissue Sampling Modality
   Takumi Onoyama et al, 2019, Journal of Clinical Medicine CrossRef
2. Endoscopic ultrasound-guided fine-needle aspiration biopsy - Recent topics and technical tips
   Kazuya Matsumoto et al, 2019, World Journal of Clinical Cases CrossRef
3. Mucins: the Old, the New and the Promising Factors in Hepatobiliary Carcinogenesis
   Aldona Kasprzak et al, 2019, International Journal of Molecular Sciences CrossRef
4. Peroral Cholangioscopy-Guided Forceps Biopsy and Endoscopic Scraper for the Diagnosis of Indeterminate Extrahepatic Biliary Stricture
   Masayuki Kato et al, 2019, Journal of Clinical Medicine CrossRef