Cancer immunotherapy using PolyPurine Reverse Hoogsteen hairpins targeting the PD-1/PD-L1 pathway in human tumor cells Medina Enríquez, Miriam Marlene ; Félix, Alex J. ; Ciudad, Carlos J. ; Noé, Véronique Abstract Publication: PLoS ONE Pub Date: November 2018 DOI: 10.1371/journal.pone.0206818 Bibcode: 2018PLoSO..1306818M