About the cover: Representative co-registered coronal whole-body [11C]erlotinib PET summation (0-90minutes) and MR (T1-weighted gradient echo sequence) images of an EGFRfl/fl (left) and an EGFRΔhep (right) mouse. See the article by Langer et al., (dx.doi.org/10.1124/dmd.117.077081).