About the cover: Hepatic localization of transgene expression after a single dose of saline (first column), 1 × 1011 particles of a first generation adenovirus expressing beta-galactosidase (AdlacZ, second column) or 1 × 1011 particles of a vector of the same generation expressing green fluorescent protein (GFP) with RGD residues removed from capsid proteins (AdRGD,third column) or a GFP expressing first generation adenovirus (AdGFP, fourth column). See the article by Croyle et al., (dx.doi.org/10.1124/dmd.115.068874).