Funding for this research was provided by:
National Cancer Institute Cancer Center (P30CA014089)
Received: 23 August 2018
Accepted: 8 May 2019
First Online: 15 May 2019
Ethics approval and consent to participate
: Ethical approval and oversight for prospective sample collection was performed with the consent of all research subjects under auspices of the University of Southern California Institutional Review Board (IRB Protocol number: HS-11-00450). Prospective, voluntary written informed consent was obtained from all subjects prior to data and specimen collection.
: Not applicable.
: The authors declare that they have no competing interests.