“Microfabricated Particles for Engineered Drug Therapies: Elucidation into the Mechanisms of Cellular Internalization of PRINT Particles” by Stephanie E. A. Gratton, Mary E. Napier, Patricia A. Ropp, Shaomin Tian, and Joseph M. DeSimone (DOI: 10.1007/s11095-008-9654-8) should have been included in the Theme Section on Micro/Nanocarriers (Vol. 26, No. 1) introduced by this Editorial, but was inadvertently published in Vol. 25, No. 12, pp. 2845–2852.