P4‐220: The Measurement of Hippocampal Atrophy Rates With MRI for A 3‐Year Study Appears to Be at Least 3 Times More Sensitive Than A 1‐Year Study Based on Back‐To‐Back Reproducibility. (1st July 2016) - Cover, Keith S.; van Schijndel, Ronald A.; Versteeg, Adriaan; Leung, Kelvin K.; Redolfi, Alberto; Manset, David; Damangir, Soheil; Bosco, Paolo; Vrenken, Hugo; van Dijk, Bob W.; Frisoni, Giovanni B.; Barkhof, Frederik