8Hodge KK, McNeal JE, Terris MK, et al. Random systematic versus directed ultrasound guided transrectal core biopsies of the prostate[J]. J Urol, 1989, 142(1): 71-75.
9Scherr DS, Eastham J, Ohori M, et al. Prostate biopsy techniques and indications: when, where, and how?[J]. Semin Urol Oncol, 2002, 20(1): 18-31.
10Kravchick S, Cytron S, Peled R, et al. Using gray-scale and two different techniques of color Doppler sonography to detect prostate cancer[J]. Urology, 2003, 61(5): 977-981.