TY  - RPRT
TI  - Sildenafil and erectile dysfunction.
AU  - A Fabbri
AU  - A Aversa
AU  - A Isidori
PY  - 1999
DO  - 10.1007/bf03343595
UR  - https://pubmed.ncbi.nlm.nih.gov/10435861/
ID  - 10435861
ER  -