Discrete element method-based simulation system for predicting natural stone evacuation pathways in patients with urolithiasis. - Naoaki Okabayashi; Katsuki Hirai; Takayuki Nagata; Kazuhide Makiyama; Junichi Matsuzaki; Kota Fukuda; Shun Takahashi; Mitsuru Komeya; Hiroshi Kimura (Comput. Biol. Medicine, 2025)