About the Authors
Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
Neuroregeneration Laboratories, McLean Hospital and Harvard University Udall Parkinson's Disease Research Center of Excellence, Belmont, Massachusetts, United States of America
The authors have declared that no competing interests exist.
MLH, OI, and DJS designed the study. MLH, MP, CRN, and LL conducted surgical experiments. MLH collected and analyzed the data. MLH and DJS interpreted the data and drafted the manuscript. All authors have reviewed and approved the manuscript.