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2. Surgeons British Assosciation of Urological.www.baus.org.uk/patients/conditions/3/erectile_dysfunction_impotence. 2020.https://www.baus.org.uk/patients/conditions/3/erectile_dysfunction_impotence.
3. NICE.bnf.nice.org.uk/treatment-summary/erectile-dysfunction. 2019.https://bnf.nice.org.uk/treatment-summary/erectile-dysfunction.html.
4. Alprostadil for the treatment of impotence