CHRNA7 and Alzheimer disease: GWAS studies revealed that potential candidate CNVs were found in AD patients, such as CHRNA7 And FAM7A Fusion (CHRFAM7A), DOP1 Leucine Zipper Like Protein B (DOPEY2), Reelin (RELN), Major Histocompatibility Complex, Class II, DR Alpha (HLA-DRA) [83].