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Review
Case Control Study
Retrospective Cohort Study
Evidence-Based Medicine
Cristiana Lo Nigro, Vincenzo Ricci, Daniela Vivenza, Martino Monteverde, Giuliana Strola, Francesco Lucio, Federica Tonissi, Emanuela Miraglio, Cristina Granetto, Mirella Fortunato, Marco Carlo Merlano 
World J Gastrointest Oncol 8(2):222-230. Published online Feb 15, 2016. doi: 10.4251/wjgo.v8.i2.222
Case Report
Nikolaos Tsoukalas, Michail Galanopoulos, Maria Tolia, Maria Kiakou, Georgios Nakos, Aristoula Papakostidi, Georgios Koumakis 
World J Gastrointest Oncol 8(2):231-234. Published online Feb 15, 2016. doi: 10.4251/wjgo.v8.i2.231