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Comparison of 0.2 mg group (tamsulosin 0.2 mg once daily) and of 0.4 mg group (tamsulosin 0.4 mg once daily) in improvement in IPSS, QoL, Qmax, and PVR
IPSS: International Prostate Symptom Score, QoL: quality of life, Qmax: maximal urinary flow rate, PVR: postvoid residual urine volume
