Association Between Serum N-Terminal Prohormone of Brain Natriuretic Peptide (NT-proBNP) Levels and Frailty in Community-Dwelling Old-Old Older Adults ― SONIC Study - Terada, Saya; Godai, Kayo; Kabayama, Mai; Kido, Michiko; Akagi, Yuya; Maus, Marlon; Akasaka, Hiroshi; Takami, Yoichi; Nakagawa, Takeshi; Yasumoto, Saori; Gondo, Yasuyuki; Ikebe, Kazunori; et al. (Circulation reports, 2025)