"However Gd is also retained in the brain, bone, skin, and other tissues in patients with normal renal function, and the presence of Gd can persist months to years after the last administration of a GBCA."

This is therapy. May persist... I want to throw this here, because there is a lot of discussion here by not only a few patients but a few very knowledgeable researchers which is surprising for such an extremely niche field, and the discussion is amazing.