Received: 28 February 2018
Accepted: 28 June 2018
First Online: 17 September 2018
: J.M.H. is on the Medical Advisory Boards of Enspire DBS and Circuit Therapeutics, and the Surgical Advisory Board for Neuropace, Inc. K.V.S. is a consultant to Neuralink Corp. and on the Scientific Advisory Boards of CTRL-Labs, Inc. and Heal, Inc. These entities did not support this work. D.S. and J.C. are employed by Google Inc., and R.J. was employed by Google Inc. at the time the research was conducted. This funder provided support in the form of salaries for authors, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.