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    Tyndall, M. W., Nasio, J., Maitha, G., Ndinya-Achola, J. O., Plummer, F. A., Sellors, J. W., Luinstra, K. E., Jang, D., Mahony, J. B., & Chernesky, M. A. (1994). leukocyte esterase urine strips for the screening of men with urethritis--use in developing countries.. Sexually transmitted infections, 70(1), 3–6. http://access.bl.uk/ark:/81055/vdc_100142298225.0x000002