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APA Citation
Grenga, I., Lepone, L., Donahue, R., Richards, J., Metenou, S., Heery, C. R., Madan, R., Gulley, J. L., & Schlom, J. (n.d.). effect of age and cancer on peripheral immune cell subsets and their PD-1 and PD-L1 expression. Journal for immunotherapy of cancer, 3, . http://access.bl.uk/ark:/81055/vdc_100135177705.0x000002