ACS Nano ACS Nano Quantification of Lipoprotein Uptake in Vivo Using Magnetic Particle Imaging and Spectroscopy Hildebrand S. Löwa N. Paysen H. Fratila R.M. Reverte-Salisa L. Trakoolwilaiwan T. Niu Z. Kasparis G. Preuss S.F. Kosch O. De La Fuente J.M. Thanh N.T.K. Wiekhorst F. Pfeifer A. 2021 research-article