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Wagstaff, John, et al. "Combined Nivolumab and Ipilimumab or Monotherapy in Untreated Melanoma." New England Journal of Medicine 373, no. 1 (2015): 23-34.

Wagstaff, John, et al. "Combined Nivolumab and Ipilimumab or Monotherapy in Untreated Melanoma." New England Journal of Medicine 373.1 (2015): 23-34.