Schüller, H. M., Scholten, P. E., Lettinga, K., Marti, R. K., & Van Noorden, C. J. F. (1993). High cathepsin B activity in arthroplasty interface membranes: A histochemical study of 9 loose cemented total hip prostheses. Acta Orthopaedica, 64(6), 613–618. https://doi.org/10.3109/17453679308994583