1. From the Department of Pathobiology (M.R., F.B., E.A.K., J.L.R., M.E.R.), the Interdisciplinary Graduate Program in Nutritional Sciences (B.J.B., E.A.K., M.E.R.), the Department of Bioengineering (M.S., C.M.G.), and the Department of Pathology (S.M.S., C.M.G., M.E.R.), University of Washington, Seattle.