Taki, N., Tatro, J., Nalepka, J., Togawa, D., Goldberg, V., Rimnac, C. M., & Greenfield, E. M.(2005).Polyethylene and titanium particles induce osteolysis by similar, lymphocyte-independent, mechanisms..Journal of orthopaedic research : official publication of the Orthopaedic Research Society,23(2),376-83.