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Editorial
Topic Highlight
Elham Maserat, Reza Safdari, Elnaz Maserat, Mohamad Reza Zali 
World J Gastrointest Oncol 4(4):76-81. Published online Apr 15, 2012. doi: 10.4251/wjgo.v4.i4.76
Mohamad Amin Pourhoseingholi, Mohammad Reza Zali 
World J Gastrointest Oncol 4(4):82-83. Published online Apr 15, 2012. doi: 10.4251/wjgo.v4.i4.82
Brief Article
Ze-Yu Wu, Gang Zhao, Zhe Chen, Jia-Lin Du, Jin Wan, Feng Lin, Lin Peng 
World J Gastrointest Oncol 4(4):84-88. Published online Apr 15, 2012. doi: 10.4251/wjgo.v4.i4.84
Case Report
Theodoros Argyropoulos, Periklis Foukas, Maria Kefala, Panagiotis Xylardistos, Sotirios Papageorgiou, Nikolaos Machairas, Evmorfia Boltetsou, Anastasios Machairas, Ioannis G Panayiotides 
World J Gastrointest Oncol 4(4):89-93. Published online Apr 15, 2012. doi: 10.4251/wjgo.v4.i4.89