IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-3-47074 Original Research Paper Cross Sectional Study Of Effects And Comparison Of Oral Sildenafil With Intracavernosal Injection Of Papaverine In Penile Doppler Ultrasonography Assessment Of Erectile Dysfunction Parmar Bharat Kuberbhai Dr. Dr. Pedro P Dr. March 2023 12 3 01 02