AUTHOR=Terreno Enzo , Aime Silvio TITLE=MRI Contrast Agents for Pharmacological Research JOURNAL=Frontiers in Pharmacology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2015.00290 DOI=10.3389/fphar.2015.00290 ISSN=1663-9812