In the article that appeared on page 1 of the January-March 2016 issue, an error appeared at the end of the first column of page 4. The corrected sentence should read:
Overall, based on visual reads, PET amyloid positivity was highest among mild AD ApoE E4 carriers (90%), followed by prodromal AD ApoE E4 carriers (71%), mild AD noncarriers (58%), and prodromal AD noncarriers (31%).
Sevigny J, Suhy J, Chiao P, et al.. Amyloid PET Screening for Enrichment of Early-Stage Alzheimer Disease Clinical Trials: Experience in a Phase 1b Clinical Trial. Alzheimer Dis Assoc Disord. 2016;30:1–7.