Received: 15 August 2019
Accepted: 6 December 2019
First Online: 13 January 2020
Ethics approval and consent to participate
: The study was reviewed and deemed exempt from human subjects protection procedures by the University of California, San Francisco Committee on Human Research # 15–15698. Participants received an information sheet about the study, signed audio-recording and photography consent and received $50 for participating in each of the 2-h focus group sessions.
: Not applicable.
: The authors declare that they have no competing interests.