?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=X&rft.au=Li%2C+X&rft.aulast=Li&rft.date=2+October+2018&rft.atitle=Learning+Subject-Specific+Directed+Acyclic+Graphs+With+Mixed+Effects+Structural+Equation+Models+From+Observational+Data&rft.volume=9&rft.title=Frontiers+in+Genetics&rft.issn=1664-8021&rft.genre=article