Basu et al. (2003) concludes that Austro–Asiatic tribal populations entered India first from the Northwest corridor and much later some of them through Northeastern corridor. Whereas, Kumar et al. (2007) analysed 25 South Asian Austro-Asiatic tribes and found strong paternal genetic link among the sub-linguistic groups of the South Asian Austro-Asiatic populations. Mukherjee et al. (2001) places Pakistanis and North Indians between west Asian and Central Asian populations, whereas Cordaux et al. (2004) argues that the Indian caste populations are closer to Central Asian populations. Sahoo et al. (2006) and Sengupta et al. (2006) suggest that Indian caste populations have not been subject to any recent admixtures. Sanghamitra Sahoo concludes his study with: