Rees, R. C., Clegg, A., Smith, G. T., Potter, C. W., Fox, M., & Williams, J. L. (1982). Natural killer cell activity and response to phytohaemagglutinin compared with the histological diagnosis of patients with transitional cell carcinoma of the bladder. British Journal Of Urology, 54(3), 261-6. https://doi.org/10.1111/j.1464-410x.1982.tb06972.x