P3‐400: MYOINOSITOL CONCENTRATION AND VOLUME OF THE POSTERIOR CINGULATE CORTEX ACROSS THE AD CONTINUUM MEASURED BY 7T MRI/MRS. (1st July 2019) - Göschel, Laura; Köbe, Theresa; Wang, Hui; Aydin, Semiha; Ittermann, Bernd; Fillmer, Ariane; Flöel, Agnes