About the Authors

William B. Ludington

ludington@carnegiescience.edu (WBL); wja@scripps.edu (WWJ)

Affiliations Department of Embryology, Carnegie Institution for Science, Baltimore, Maryland, United States of America, Department of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America

William W. Ja

ludington@carnegiescience.edu (WBL); wja@scripps.edu (WWJ)

Affiliations Department of Neuroscience, The Scripps Research Institute, Jupiter, Florida, United States of America, Center on Aging, The Scripps Research Institute, Jupiter, Florida, United States of America

Competing Interests

The authors have declared that no competing interests exist.