Chao, Stephanie D. http://orcid.org/0000-0003-0139-8551
Cheung, Chrissy M. http://orcid.org/0000-0002-3119-3429
Chang, Ellen T. http://orcid.org/0000-0002-7169-157X
Pei, Allison http://orcid.org/0000-0003-2561-5602
So, Samuel K. S. http://orcid.org/0000-0003-3108-086X
Funding for this research was provided by:
Centers for Disease Control and Prevention (1R18PS000830)
Article History
Received: 12 September 2018
Accepted: 23 July 2019
First Online: 2 August 2019
Ethics approval and consent to participate
: All study participants provided written consent for participation. The study was reviewed and approved by the Stanford University Institutional Review Board (Protocol Number 11164).
: N/A.
: The authors declare that they have no competing interests.