title: Defining the phases of clinical trials.
authors.affiliation: AstraZenca Pharmaceuticals, Wilmington, DE, USA.
authors.forename: Vu
authors.initials: V
authors.lastname: Nguyen
authors.forename: Burgunda V
authors.initials: BV
authors.lastname: Sweet
authors.forename: Thomas
authors.initials: T
authors.lastname: Macek
mesh_terms: D002986:Clinical Trials as Topic / Q000145:classification* / Q000379:methods; D014481:United States