title: Diversification of the portfolio.
authors.forename: B L
authors.initials: BL
authors.lastname: Zaret
mesh_terms: D006321:Heart / Q000000981:diagnostic imaging*; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D009683:Nuclear Medicine / Q000639:trends; D011877:Radionuclide Imaging