Funding for this research was provided by:
Kaiser Permanente Northern California Community Benefit Fund (N/A)
Text and Data Mining valid from 2020-02-19
Received: 3 April 2019
Accepted: 13 February 2020
First Online: 19 February 2020
Ethics approval and consent to participate
: This study was approved by the Kaiser Permanente Northern California institutional review board in accordance with its ethical standards and consistent with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.