A<unk> , also known as<unk>  smear, is a way to collect DNA from the cells on the inside of a person's cheek.<unk> s are a relatively non-invasive way to collect DNA samples for testing.<unk>  means cheek or mouth. It is very common in clinical trials and in law enforcement investigations where it can include or exclude individuals as suspects.
Buccal swab
Cotton swab
High vaginal swab
Tao brush
History and culture of breastfeeding
Ductal lavage
Oral microbiology
Anthropometry