?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Kim&rft.au=Kim%2C+S-M&rft.aufirst=S-M&rft.atitle=Repurposing+erectile+dysfunction+drugs+tadalafil+and+vardenafil+to+increase+bone+mass&rft.volume=117&rft.date=8+June+2020&rft.pages=14386-14394&rft.title=Proceedings+of+the+National+Academy+of+Sciences+(PNAS)&rft.issue=25&rft.genre=article