Figure Legend 1 is incorrect in the online version of this article. The publisher apologizes for this error. The correct version of Figure Legend 1 can be viewed here:

Figure 1. Locations of tail biopsy examination sites. A 5 mm section from the end of the tail was taken from C57BL/6 mice at 0, 3, and 7 days postpartum (PPD). The tissue was cut into 3 pieces and prepared for toluidine blue staining, transmission electron microscopy (TEM), and calcitonin gene-related peptide (CGRP) immunostaining. The arrows indicate the areas examined by TEM and bright field microscopy.

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