A review of human studies found that the mir-320e is associated with traffic-related air pollution exposure, showing a positive association with the Z-Score(TRAP) intensity in plasma [Kotsyfakis et al. DOI:10.1080/1354750X.2019.1652348]. A systematic review of human studies found that the mir-320e is associated with traffic-related air pollution (TRAP) exposure, showing a positive association with TRAP intensity in plasma [Kotsyfakis & Patelarou DOI:10.1080/1354750X.2019.1652348]. Separately, a study in humans demonstrated that the mir-320e was differentially expressed and shared across four pairs of monozygotic twins, suggesting its potential utility for forensic discrimination between genetically identical individuals [Xiao et al. DOI:10.1016/j.fsigen.2019.05.003].