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[]
["Table1    Description of  histological grading system (according to Teitelbaum) "]
["Grade ","Histopathology"]
[0,"No abnormalities "]
["I   ","Crypt dilatation and mucin retention"]
["II   ","Cryptitis or two crypt abscesses"]
["III    ","Multiple crypt abscesses"]
["IV    ","Fibrinopurulent debris and mucosal ulceration"]
["V       ","Transluminal necrosis or perforation"]

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