A Systematic Comparison of Age, Comorbidity and Frailty of Two Defined ICU Populations in the German Helios Hospital Group from 2016–2021. - Hoffmann, Kristina; Hohenstein, Sven; Brederlau, Jörg; Hirsch, Jan; Groesdonk, Heinrich V.; Bollmann, Andreas; Kuhlen, Ralf (Journal of Clinical Medicine, 2025)