- Hemochromatosis protein (HFE) and tumor necrosis factor receptor 2 (TNFR2) influence tissue iron levels: elements of a common gut pathway? Meyer, P.N., Gerhard, G.S., Yoshida, Y., Yoshida, M., Chorney, K.A., Beard, J., Kauffman, E.J., Weiss, G., Chorney, M.J. Blood Cells Mol. Dis. (2002)