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Prospective Study
Arnold Radtke, George Sgourakis, Ernesto P Molmenti, Susanne Beckebaum, Vito R Cicinnati, Hartmut Schmidt, Heinz-Otto Peitgen, Christoph E Broelsch, Massimo Malagó, Tobias Schroeder 
World J Gastroenterol 21(19):6008-6017. Published online May 21, 2015. doi: 10.3748/wjg.v21.i19.6008
Meta-Analysis
Chang Seok Bang, Gwang Ho Baik, In Soo Shin, Jing Bong Kim, Ki Tae Suk, Jai Hoon Yoon, Yeon Soo Kim, Dong Joon Kim, Woon Geon Shin, Kyung Ho Kim, Hak Yang Kim, Hyun Lim, Ho Seok Kang, Jong Hyeok Kim, Jin Bae Kim, Sung Won Jung, Sea Hyub Kae, Hyun Joo Jang, Min Ho Choi 
World J Gastroenterol 21(19):6032-6043. Published online May 21, 2015. doi: 10.3748/wjg.v21.i19.6032
Case Report
Yang Song, Yan-Hong Shi, Chong He, Chang-Qin Liu, Jun-Shan Wang, Yu-Jie Zhao, Yan-Min Guo, Rui-Jin Wu, Xiao-Yue Feng, Zhan-Ju Liu 
World J Gastroenterol 21(19):6082-6087. Published online May 21, 2015. doi: 10.3748/wjg.v21.i19.6082