Embolization of rectal arteries for treating hemorrhoidal disease using a combination of microspheres and microcoils: a pilot study - Oliveira, Daniel Simoes de; Hora, Jose Americo Bacchi; Assis, Andre Moreira de; Moreira, Airton Mota; Nahas, Sergio Carlos; Carnevale, Francisco Cesar (Cardoivascular and Interventional Radiology, 2025)