We thank Daniel Metzger and Pierre Chambon for the TSLP-luciferase reporter construct and the K5-CREERT mice, Lothar and Ursula Zimber-Strobl for the conditional Notch2 mice, Tasuku Honjo for the conditional RBP-J mice, Graham Lieschke for the G-CSF−/− mice, Brian Nickoloff for primary human keratinocytes and Dagmar Simon for tissue samples from AD patients. Here, NOTCH2 is linked to Alzheimer disease.