Is there a compression of morbidity and does it vary across social strata among older European adults? A retrospective cohort study of two waves 15 years apart. - Alonso-Perez E; O'Sullivan JL; Heisig JP; Correll CU; Steinhagen-Thiessen E; Rudolf H; Fuellen G; Gellert P (Archives of gerontology and geriatrics, 2026)