Findings of NFL thinning have indicated a significant reduction of thickness among quadrants of this tissue layer [ 10 , 13 , 19 , 34 , 62 , 87 , 104 , 106 , 113 , 114 , 124 , 135 , 145 – 147 , 167 ], although some findings did not reach statistical significance [ 1 , 50 , 79 , 91 , 110 , 111 , 167 ].
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