?url_ver=Z39.88-2004&rft_id=10.1377%2Fhlthaff.23.1.48&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Pammolli%2C+Fabio&rft.aulast=Pammolli&rft.aufirst=Fabio&rft.issn=0278-2715&rft.atitle=Market+Structure+And+Drug+Innovation&rft.title=Health+Affairs&rft.date=2004&rft.volume=23&rft.issue=1&rft.pages=48-50&rft.genre=article