Baseline levels and longitudinal changes in plasma Aβ42/40 among Black and white individuals oleh Chengjie Xiong, Jingqin Luo, David A. Wolk, Leslie M. Shaw, Erik D. Roberson, Charles F. Murchison, Rachel L. Henson, Tammie L. S. Benzinger, Quoc Bui, Folasade Agboola, Elizabeth Grant, Emily N. Gremminger, Krista L. Moulder, David S. Geldmacher, Olivio J. Clay, Ganesh Babulal, Carlos Cruchaga, David M. Holtzman, Randall J. Bateman, John C. Morris, Suzanne E. Schindler