Operative results and oncologic outcomes of Associating Liver Partition and Portal Vein Ligation for Staged Hepatectomy (ALPPS) versus Two-Stage Hepatectomy (TSH) in patients with unresectable colorectal liver metastases: a systematic review and meta-analysis - Moris, D; Ronnekleiv-Kelly, S; Kostakis, ID (World J Surg, 2018)