P4‐101: REGIONAL VARIATION IN ALZHEIMER'S DISEASE PROGRESSION IN A CLINICAL TRIAL SETTING. (1st July 2014) - Henley, David B.; Dowsett, Sherie A.; Chen, Yun‐Fei; Liu‐Seifert, Hong; Grill, Joshua D.; Doody, Rachelle; Aisen, Paul; Raman, Rema; Miller, David S.; Hake, Ann Marie; Cummings, Jeffrey