Not every modern human has the same set of Neanderthal DNA, however; different people will, by chance, have inherited different fragments. But there are also some areas, termed “Neanderthal deserts,” ...
Hrdlicka, Ales. 1927. "The Neanderthal phase of man. The Huxley Memorial Lecture for 1927." The Journal of the Royal Anthropological Institute of Great Britain and Ireland, 249-274, pls. 6-9, 5 figs.