Figure 1 of Bhattacharjee, Mol Vis 2008; 14:841-850.

Figure 1. Map of India showing the respective locations of the 24 ethnic groups representing the population of the country. These ethnic groups are classified on the basis of four major linguistic groups (Indo-European, Austro-Asiatic, Tibeto-Burman, and Dravidian) that define genetic variation in the population based on reported studies conducted on mitochondrial and autosomal genes.