Molecular and Nano-Structural Optimization of Nanoparticulate Mn 2+ -Hexarhenium Cluster Complexes for Optimal Balance of High T 1 - and T 2 -Weighted Contrast Ability with Low Hemoagglutination and Cytotoxicity. - Akhmadeev, Bulat Salavatovich; Nizameev, Irek R.; Kholin, Kirill V.; Voloshina, Alexandra D.; Gerasimova, Tatyana P.; Gubaidullin, Aidar T.; Kadirov, Marsil K.; Ismaev, Ildus E.; Brylev, Konstantin A.; Zairov, Rustem R.; Mustafina, Asiya R. (Pharmaceutics, 2022)