Author = AHMED S. ALI, M.Sc.*
Comparative Study between Use of Endoscopic Ultrasound before Endoscopic Retrograde Cholangio Pancreatography Versus Endoscopic Retrograde Cholangio Pancreatography Alone

Volume 86, December, December 2018, Pages 4033-4037

ALI A. WAHEEB, M.D.; MOHAMED A. ABD EL-KHALIK, M.D.; ABD EL-HALIM A. EL-SHERIF, M.D.; AHMED EL-WASSEF, M.D.; AHMED S. ALI, M.Sc.*