Dark-field X-ray imaging for the assessment of osteoporosis in human lumbar spine specimens. - Gassert FT; Urban T; Kufner A; Frank M; Feuerriegel GC; Baum T; Makowski MR; Braun C; Pfeiffer D; Schwaiger BJ; Pfeiffer F; Gersing AS (Frontiers in physiology, 2023)