{Reference Type}: Letter {Title}: Older Adults With Smaller and Less Complex Social Networks Show Deficits in Medial Temporal Cerebrovascular Reactivity. {Author}: Chang E;Kapoor A;Lohman T;Dutt S;Alitin JPM;Sible IJ;Ho JK;Gaubert A;Blanken AE;Mather M;Shao X;Wang DJJ;Nation DA; {Journal}: J Am Heart Assoc {Volume}: 13 {Issue}: 15 {Year}: 2024 Aug 6 {Factor}: 6.106 {DOI}: 10.1161/JAHA.124.034390