A Modular Core-Shell Nanoparticle Platform for Dual-Modal MRI-Luminescence With High Relaxivity. - Ashton CJ; Martinelli J; Camorali S; Berki TR; Managh AJ; Sofroniou C; Tei L; Willcock H; Butler SJ (Small (Weinheim an der Bergstrasse, Germany), 2026)