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Cover: The cover shows intravital epi-fluorescence microscopy displaying arteriolo-venular bundles in mice administered erythtopoietin and/or Nω-nitro-L-arginine methylester in a dorsal skinfold chamber. Contrast was enhanced with FITCdextran 150,000, with magnification x80. For more information see the paper by Rezaeian et al on page 40.