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their rheumatologist and their primary care doctor to understand that their IL-6 has closed the iron gates with a biologically appropriate but clinically devastating precision. They need IV iron that bypasses the blocked absorption and...

scales in the brain. Much ongoing work in MRI is focusing on this challenge, aiming to make imaging methods more biologically precise6. A second limitation is that we can’t separately measure entry and exit from the brain in humans. For...

and most important section of the paper. The authors try to interpret what these detected elements might mean biologically, while comparing their measurements with toxicology literature. They acknowledge that this was only a pilot study...

conducted a sensitivity analysis, in which and were independently sampled from log-uniform distributions spanning the full biologically plausible range for each organ (n = 300 parameter sets; see “Methods”). Across all post-mitotic...