http://www.firstpost.com/fwire/indian-scientists-suspect-genetic-diseases-could-be-linked-to-the-tradition-of-marrying-within-caste-3827701.html
http://www.firstpost.com/fwire/indian-scientists-suspect-genetic-diseases-could-be-linked-to-the-tradition-of-marrying-within-caste-3827701.html