New drug development in the United States from 1963 to 1999.
Dimasi
J A
JA
Tufts Center for the Study of Drug Development, Tufts University., Boston, MA 02111, USA.
D017277:Drug Approval / Q000706:statistics & numerical data*; D004345:Drug Industry / Q000191:economics / Q000639:trends*; D015507:Drugs, Investigational; D006801:Humans; D013678:Technology, Pharmaceutical / Q000639:trends*; D014481:United States
D015507:Drugs, Investigational