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Review
Ademar Dantas Cunha Júnior, Arinilda Campos Bragagnoli, Felipe Osório Costa, José Barreto Campello Carvalheira 
World J Gastroenterol 27(17):1883-1904. Published online May 7, 2021. doi: 10.3748/wjg.v27.i17.1883
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