1. Todd, J., Clinical Diagnosis and Management by Laboratory Methods. WB Saunders, Phil, Pa 1979, pp. 592–593.
2. Greenberger, N., Saegh, S., and Ruppert, R., Gastroenterol., 1968, vol. 55, no. 2, p. 204.
3. Dealler, S.F., Belfield, P.W., Bedford, M., Whitley, A.J., and Mulley, G.P., J. Urol., 1989, vol. 142, no. 3, p. 769.
4. Niwa, T. and Ise, M., J. Lab. Clin. Med., 1994, vol. 124, no. 1, p. 96.
5. Bueschkens, D.H. and Stiles, M.E., Appl. Environ. Microbiol., 1984, vol. 48, no. 3, p. 601.