A comparative study of postendoscopic sphincterotomy complications with various types of electrosurgical current in patients with choledocholithiasis. - Stefanidis,G.; Karamanolis,G.; Viazis,N.; Sgouros,S.; Papadopoulou,E.; Ntatsakis,K.; Mantides,A.; Nastos,H. (Gastrointest Endosc, 2003)