Cover picture: Multimodal multiphoton microscopic characterization of ex vivo spinal tissues. Shown are sum frequency generation imaging of astrocyte processes (green), coherent anti-Stokes Raman scattering imaging of myelin sheath (red), and two-photon excitation fluorescence imaging of SR101 (gray) and calcium indicator Oregon Green 488 BAPTA-2 AM (blue), both labeling the astrocyte processes. Bar = 10 µm for the left and middle columns. Bar = 5 µm for the right column. See the article by Fu et al. on page 3251.