A study in human samples demonstrated that mir-9-1 exhibited considerably higher expression in pooled brain tissue, identifying it as a promising marker for brain identification [Sauer et al. DOI:10.1016/j.fsigen.2017.02.002]. A study in rhesus macaques demonstrated that the mir-9-1 was utilized as a feature in a Day 21 pleural effusion prediction model by gender, which was developed to forecast complications following whole thorax irradiation [May et al. DOI:10.1038/s41598-022-16316-x].