information of control subjects from certain ethnic groups, such as Caucasian, African-American, and Asian American [5,6]. These general population databases greatly help with clinical interpretation of CNVs, which can be divided into three main categories: pathogenic, uncertain clinical significance, or benign [7]. Recently, publications focusing on CNVs of specific ethnicities such as Koreans [8], Europeans [9], and Chinese [10] emphasize the fact that there are significant amount of population-specific CNVs. So far the number of Thai individuals represented in the existing databases for CNV in general population is very limited [11], and thus they are by no means the ideal references for CNV interpretation in Thais.