Clinical significance of postoperative cardiothoracic ratio for postoperative pleural effusion following hepatectomy. - Sakamoto A; Sakamoto K; Hikida T; Ito C; Iwata M; Shine M; Uraoka M; Nagaoka T; Honjo M; Tamura K; Funamizu N; Ogawa K; et al. (BMC surgery, 2025)