PopulationsHumansMON-751 Low Serum 25-Hydroxyvitamin D as a Risk Factor for Frailty in Older Men: A Korean Nationwide StudyENDO 2025 AbstractThe paperKim BJ, Lee J, Ha J et al.ENDO 2025 Abstract · 22 Oct 2025 · CC BY-NC-NDPresented at ENDO 2025doi.org/10.1210/jendso/bvaf149.494