Tobari and colleagues studied the CNV burden in patients with cervical cancer from Mexican American ancestry.
is the deletion burden observed really exceptional in a population sample of similar ancestry? To answer this question, I would refer to the 1000 genomes data where there are Mexicans, Colombians, Puerto Ricans and Peruvians. There must be available CNV estimations for these ancestries. If you find good estimates then perhaps a statistical tests with those as your control group would be more believable.