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Basic Study
Retrospective Study
Xian-Qiang Wang, Zhe Liu, Wen-Ping Lv, Ying Luo, Guang-Yun Yang, Chong-Hui Li, Xiang-Fei Meng, Yang Liu, Ke-Sen Xu, Jia-Hong Dong 
World J Gastroenterol 21(31):9394-9402. Published online Aug 21, 2015. doi: 10.3748/wjg.v21.i31.9394
Observational Study
Caroline Aquino Moreira-Nunes, Diego di Felipe Ávila Alcântara, Sérgio Figueiredo Lima-Júnior, Sandro Roberto de Araújo Cavalléro, Juan Antonio Rey, Giovanny Rebouças Pinto, Paulo Pimentel de Assumpção, Rommel Rodriguez Burbano 
World J Gastroenterol 21(31):9413-9419. Published online Aug 21, 2015. doi: 10.3748/wjg.v21.i31.9413
Systematic Reviews
Milly Buwenge, Francesco Cellini, Nicola Silvestris, Savino Cilla, Francesco Deodato, Gabriella Macchia, Gian C Mattiucci, Vincenzo Valentini, Alessio G Morganti 
World J Gastroenterol 21(31):9420-9429. Published online Aug 21, 2015. doi: 10.3748/wjg.v21.i31.9420
Case Report
Yoshitsugu Misumi, Toshio Fujisawa, Hirotsugu Hashimoto, Koichi Kagawa, Tamaki Noie, Hideyuki Chiba, Hajime Horiuchi, Yasushi Harihara, Nobuyuki Matsuhashi 
World J Gastroenterol 21(31):9442-9447. Published online Aug 21, 2015. doi: 10.3748/wjg.v21.i31.9442