Change in Use of Gadolinium-Enhanced Magnetic Resonance Studies in Kidney Disease Patients After US Food and Drug Administration Warnings: A Cross-sectional Study of Veterans Affairs Health Care System Data From 2005-2008

There was a large decrease in the use of GE-MR studies in patients with GFR <30 mL/min/1.73 m2 and a large but not universal increase in the practice of measuring serum creatinine before GE-MR after the release of the FDA warnings.