Laparoscopically guided transversus abdominis plane block versus local wound analgesia in laparoscopic surgery for peritoneal endometriosis: study protocol for a prospective randomized controlled double-blinded LTAP-trial. - Terho, Anna; Puhto, Terhi; Laru, Johanna; Uimari, Outi; Ohtonen, Pasi; Rautio, Tero; Koivurova, Sari (Trials, 2022)