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Review
Juan Ramón Larrubia, Megha Uttam Lokhande, Silvia García-Garzón, Joaquín Miquel, Dolores Subirá, Eduardo Sanz-de-Villalobos 
World J Gastroenterol 19(12):1877-1889. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1877
Original Article
Roja Rahimi, Amir Baghaei, Maryam Baeeri, Gholamreza Amin, Mohammad Reza Shams-Ardekani, Mahnaz Khanavi, Mohammad Abdollahi 
World J Gastroenterol 19(12):1901-1911. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1901
Brief Article
Danielle A Vieira-Lopes, Nadja L Pinheiro, Armando Sales, Adriana Ventura, Francisco G Araújo, Iracema D Gomes, Aparecida A Nascimento 
World J Gastroenterol 19(12):1919-1929. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1919
Lucas Malta Almeida, Luiz Claudio Castro, Rosa Harumi Uenishi, Fernanda Coutinho de Almeida, Patricia Maria Fritsch, Lenora Gandolfi, Riccardo Pratesi, Yanna Karla de Medeiros Nóbrega 
World J Gastroenterol 19(12):1930-1935. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1930
Martin Raithel, Andreas Nägel, Jürgen Maiss, Dane Wildner, Alexander Fritzkarl Hagel, Sandra Braun, Hiwot Diebel, Eckhart Georg Hahn 
World J Gastroenterol 19(12):1936-1942. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1936
Javier García-Samaniego, Miriam Romero, Rafael Granados, Remedios Alemán, Miguel Jorge Juan, Dolores Suárez, Ramón Pérez, Gregorio Castellano, Carlos González-Portela 
World J Gastroenterol 19(12):1943-1952. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1943
Andrzej Białek, Anna Wiechowska-Kozłowska, Jan Pertkiewicz, Katarzyna Karpińska, Wojciech Marlicz, Piotr Milkiewicz, Teresa Starzyńska 
World J Gastroenterol 19(12):1953-1961. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1953
Xiao-Lei Shi, Wei Zhu, Jia-Jun Tan, Jiang-Qiang Xiao, Lin Zhang, Qian Xu, Zheng-Liang Ma, Yi-Tao Ding 
World J Gastroenterol 19(12):1984-1991. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1984
Case Report
Peel Jung, Min Dae Kim, Tae Hyun Ryu, Sung Ho Choi, Han Se Kim, Kang Hun Lee, Jhong Hyun Park 
World J Gastroenterol 19(12):1997-1999. Published online Mar 28, 2013. doi: 10.3748/wjg.v19.i12.1997
Letters To The Editor