RT Journal Article SR Electronic T1 An HPV-E6/E7 immunotherapy plus PD-1 checkpoint inhibition results in tumor regression and reduction in PD-L1 expression JF Journal for ImmunoTherapy of Cancer JO J Immunother Cancer FD BMJ Publishing Group Ltd SP P449 DO 10.1186/2051-1426-3-S2-P449 VO 3 IS Suppl 2 A1 Rice, Adrian E A1 Latchman, Yvette A1 Balint, Joseph P A1 Lee, John H A1 Gabitzsch, Elizabeth S A1 Jones, Frank R YR 2015 UL http://jitc.bmj.com/content/3/Suppl_2/P449.abstract