Vermunt, Lisa; Sikkes, Sietske A.M.; Van Den Hout, Ardo; Handels, Ron; Bos, Isabelle; Van Der Flier, Wiesje M.; Kern, Silke; Ousset, Pierre‐Jean; Maruff, Paul; Skoog, Ingmar; Verhey, Frans R.J.; Freund‐Levi, Yvonne; Tsolaki, Magda; Wallin, Åsa K.; Olde Rikkert, Marcel; Soininen, Hilkka; Spiru, Luisa; Zetterberg, Henrik; Blennow, Kaj; Scheltens, Philip; Muniz‐Terrera, Graciela; Visser, Pieter Jelle; for the Alzheimer Disease Neuroimaging Initiative; AIBL Research Group; ICTUS/DSA study groups