Triple guidance of choledochoscopy, ultrasonography, and computed tomography facilitates percutaneous catheter drainage of infected walled-off necrosis. - Zhang, Hui; Wen, Xu-dong; Ma, Xiao; Zhu, Yong-qiang; Jiang, Zhi-wei; Huang, Shang-qing; Wang, Tao; Liu, Wei-hui (Insights into Imaging, 2021)