ULTRASOUND DIAGNOSTICS OF CHOLELITHIASIS IN EMERGENCY CONDITIONS, CHANGES IN THE INTRA AND EXTRAHEPATIC BILE DUCTS. Journal of Pharmaceutical Negative Results, [S. l.], p. 2674–2686, 2022. DOI: 10.47750/pnr.2022.13.S08.335. Disponível em: https://mail.pnrjournal.com/index.php/home/article/view/4376.. Acesso em: 9 jun. 2026.