Acknowledgements
BRAIN
We are grateful to all research assistants who helped to run these study visits. We are grateful to the gracious funding from the MIT Harvard Broad institute (6600024e5500000895) directly supporting the study and our line of research on brain plasticity biomarkers. Dr. Santarnecchi is supported by the Defence Advanced Research Projects Agency (DARPA) via HR001117S0030, the NIH (P01 AG031720-06A1, R01 MH117063-01, R01 AG060981-01) and ADDF (ADDF-FTD GA201902e2017902). Dr. Pascual-Leone is supported by grants from the National Institutes of Health (R24AG06142, and P01 AG031720), the National Science Foundation, and the Barcelona Brain Health Initiative funded primarily by La Caixa. Dr. Shafi is supported by the Football Players Health Study (FPHS) at Harvard University, and the NIH (R01MH115949, R01AG060987, P01 AG031720-06A1). Dr. Benwell is supported by the British Academy/Leverhulme Trust and the United Kingdom Department for Business, Energy and Industrial Strategy [SRG19/191169]. During manuscript preparation, Dr. Ross was supported by the Department of Veterans Affairs Office of Academic Affiliations Advanced Fellowship Program in Mental Illness Research and Treatment, the Medical Research Service of the Veterans Affairs Palo Alto Health Care System and the Department of Veterans Affairs Sierra-Pacific Data Science Fellowship. The content of this paper is solely the responsibility of the authors and does not necessarily represent the official views of Harvard University and its affiliated academic health care centers, or the National Institutes of Health.