We infer that the discrepancy between our results and the previous results was caused by the utilization of different exposure and outcome datasets: the serum CD33 protein association in their study was obtained from 2893 samples from two Greek population-based cohorts [24]; and the AD GWAS dataset used in their study was from a previous AD GWAS conducted in 2013 [25]. The gene discussed is CD33; the disease is Alzheimer disease.