Viscosity Prediction for Tumor Microenvironments via spin-exchange relaxation-free magnetorelaxometry of Magnetic Nanoparticles. - Xiaoyu Chen; Huangliang Wu; Yanfei Meng; Xianhong Li; Chunyi Liu; Jingyi Sheng; Xu Zhang 050; Ning Gu 003; Min Xiang (IST, 2025)