P3–173: Association between head trauma, amyloid, and neurodegeneration in a population‐based study of cognitively normal participants and participants with mild cognitive impairment. (1st July 2013) - Mielke, Michelle; Wiste, Heather; Savica, Rodolfo; Leibson, Cynthia; Wiegand, Stephen; Knopman, David; Vemuri, Prashanthi; Roberts, Rosebud; Lowe, Val; Geda, Yonas; Petersen, Ronald; Jack, Clifford