%0 Journal Article %J Proceedings of the National Academy of Sciences %D 2016 %T Why are there no persisting hybrids of humans with Denisovans, Neanderthals, or anyone else? %A Ajit Varki %B Proceedings of the National Academy of Sciences %I National Acad Sciences %V 113 %P E2354-E2354 %@ 0027-8424 %G eng %U http://www.pnas.org/content/113/17/E2354