Baseline CSF p-tau levels independently predict progression of hippocampal atrophy in Alzheimer disease W.J.P. Henneman, MD, H. Vrenken, PhD, J. Barnes, PhD, I. C. Sluimer, N. A. Verwey, MD, M. A. Blankenstein, PhD, M. Klein, PhD, N. C. Fox, MD, FRCP, P. Scheltens, MD, PhD, F. Barkhof, MD, PhD and W. M. van der Flier, PhD From the Department of Radiology (W.J.P.H., H.V., I.C.S., F.B.), I