?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=F&rft.au=Rice%2C+F&rft.aulast=Rice&rft.atitle=A+population-based+study+of+anxiety+as+a+precursor+for+depression+in+childhood+and+adolescence.&rft.volume=4&rft.date=13+December+2004&rft.title=BMC+Psychiatry&rft.issn=1471-244X&rft.genre=article