Funding for this research was provided by:
A-T Children's Project
APDM Wearable Technologies
Division of Information and Intelligent Systems (1755687)
Accepted: 14 February 2021
First Online: 2 March 2021
: All participants provided written informed consent (<i>n</i>=160) or assent (<i>n</i>=6), and the study was approved by the Institutional Review Board at Massachusetts General Hospital.
: The authors declare that they have no conflict of interest.