1 Verily Life Sciences, South San Francisco, CA, USA. mburq@verily.com.
2 Verily Life Sciences, South San Francisco, CA, USA.
3 Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Center of Expertise for Parkinson & Movement Disorders, Nijmegen, the Netherlands.
4 Radboud University, Institute for Computing and Information Sciences, Nijmegen, the Netherlands.