Post hoc integrated analysis of four placebo-controlled studies in men ( aged @ years ; International Prostate Symptom Score -LSB- IPSS -RSB- of @ ; maximum urinary flow rate -LSB- Q ( max ) -RSB- of @ to @ mL/s ) with BPH-LUTS randomised to tadalafil @ mg ( @ patients ) or placebo ( @ ) for @ weeks after a @-week placebo run-in .