title: Preface to volume 39.
authors.affiliation: Editor, Profiles of Drug Substances, Excipients, and Related Methodology. Electronic address: hbrittain@centerpharmphysics.com.
authors.forename: Harry G
authors.initials: HG
authors.lastname: Brittain
mesh_terms: D005079:Excipients / Q000032:analysis / Q000737:chemistry / Q000378:metabolism; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000737:chemistry / Q000378:metabolism
chemical_list: D005079:Excipients; D004364:Pharmaceutical Preparations