PubMedCentral https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3561883/ short tandem repeat https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3561883/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3561883/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3561883/