Hi, I came across FITC-conjugated Ferumoxytol (feraheme) in this paper (DOI: 10.1158/1078-0432.CCR-10-3420) but they did not mention how they did so or where they obtained it from. I was hoping someone could point me in the right direction on how to conjugate ferumoxytol with a fluorescent probe, or perhaps even how to conjugate a fluorescent probe to iron oxide nanoparticles. Thanks in advance.