Evaluation of patient immunocompetence for immune checkpoint inhibitor therapy using the psoas muscle index: a retrospective cohort study - Tsurui, Toshiaki; Hamada, Kazuyuki; Mura, Emiko; Suzuki, Risako; Iriguchi, Nana; Ishiguro, Tomoyuki; Hirasawa, Yuya; Ohkuma, Ryotaro; Shimokawa, Masahiro; Ariizumi, Hirotsugu; Kubota, Yutaro; Horiike, Atsushi; et al. (Frontiers in Oncology, 2025)