?url_ver=Z39.88-2004&rft_id=10.1159%2F000054645&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Johnson&rft.aufirst=L.R.&rft.au=Johnson%2C+L.R.&rft.issn=1423-0194&rft.title=Neuroendocrinology&rft.issue=4&rft.date=April+2001&rft.volume=73&rft.atitle=Oral+testosterone+self-administration+in+male+hamsters&rft.genre=article