Laparoscopic versus conventional ileoanal pouch procedure in patients undergoing elective restorative proctocolectomy (LapConPouch Trial): a randomized controlled trial - Schiessling, Serin; Ulrich, Alexis; Leowardi-Bauer, Christine; Kienle, Peter; Antolovič, Dalibor; Knebel, Phillip; Bruckner, Thomas; Kadmon, Martina; Büchler, Markus W.; Diener, Markus K. (Langenbeck's archives of surgery, 2013)