Supplementary Figure 1: Biodistribution of free 125I and 125I-nGO-PEG at 6 h post i.v. injection.
From: Preparation and functionalization of graphene nanocomposites for biomedical applications

Minimal uptake of free 125I was observed in the liver, spleen, as well as most other organs except thyroid and stomach due to the fast renal excretion of small iodine ions33.