Funding for this research was provided by:
National Cancer Institute (P30 CA069533)
Received: 12 May 2017
Accepted: 25 September 2017
First Online: 30 September 2017
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the OHSU Institutional Review Board.
: Informed consent was obtained from all individual participants included in the study. All patients provided verbal consent prior to participating in study activities.