TY  - RPRT
TI  - Oral sildenafil in erectile dysfunction.
AU  - K M Chan-Tack
PY  - 1998
DO  - 10.1016/s0140-6736(05)60375-3
UR  - https://pubmed.ncbi.nlm.nih.gov/9820338/
ID  - 9820338
ER  -