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Masato Okamoto, Masanori Kobayashi, Yoshikazu Yonemitsu, Shigeo Koido, Sadamu Homma 
World J Gastrointest Pharmacol Ther 7(1):133-138. Published online Feb 6, 2016. doi: 10.4292/wjgpt.v7.i1.133
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Luciana Bertocco de Paiva Haddad, Tassia Cristina Decimoni, Jose Antonio Turri, Roseli Leandro, Patrícia Coelho de Soárez 
World J Gastrointest Pharmacol Ther 7(1):162-170. Published online Feb 6, 2016. doi: 10.4292/wjgpt.v7.i1.162