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Epstein, Alan L., et al. “Stepping Stones Toward Cancer Immunotherapy.” Journal of Immunotherapy, vol. 28, no. 6, Ovid Technologies (Wolters Kluwer Health), 2005, pp. 643–643. Crossref, doi:10.1097/01.cji.0000191047.60943.ed.

Epstein AL, Liu A, Zhang N, Arias RS, Flanagan ML, Sadun RE, Khawli LA, Hu P. Stepping Stones Toward Cancer Immunotherapy. Journal of Immunotherapy. Ovid Technologies (Wolters Kluwer Health); 2005. p. 643–643.